./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/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 dd713315a01a83d82c28c42f2ad6c72c3349a374 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: no XNF --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 11:12:42,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 11:12:42,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 11:12:42,726 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 11:12:42,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 11:12:42,728 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 11:12:42,730 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 11:12:42,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 11:12:42,743 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 11:12:42,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 11:12:42,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 11:12:42,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 11:12:42,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 11:12:42,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 11:12:42,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 11:12:42,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 11:12:42,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 11:12:42,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 11:12:42,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 11:12:42,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 11:12:42,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 11:12:42,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 11:12:42,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 11:12:42,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 11:12:42,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 11:12:42,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 11:12:42,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 11:12:42,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 11:12:42,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 11:12:42,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 11:12:42,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 11:12:42,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 11:12:42,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 11:12:42,778 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 11:12:42,779 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 11:12:42,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 11:12:42,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 11:12:42,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 11:12:42,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 11:12:42,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 11:12:42,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 11:12:42,783 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 11:12:42,808 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 11:12:42,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 11:12:42,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 11:12:42,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 11:12:42,809 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 11:12:42,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 11:12:42,810 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 11:12:42,810 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 11:12:42,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 11:12:42,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 11:12:42,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 11:12:42,811 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 11:12:42,811 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 11:12:42,811 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 11:12:42,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 11:12:42,812 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 11:12:42,812 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 11:12:42,812 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 11:12:42,812 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 11:12:42,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 11:12:42,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 11:12:42,813 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 11:12:42,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 11:12:42,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 11:12:42,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 11:12:42,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 11:12:42,814 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 11:12:42,814 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 11:12:42,814 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 11:12:42,815 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_03fa5e52-1627-413d-a7a4-e676902de545/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 -> dd713315a01a83d82c28c42f2ad6c72c3349a374 [2019-11-20 11:12:42,962 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 11:12:42,972 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 11:12:42,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 11:12:42,988 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 11:12:42,988 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 11:12:42,990 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2019-11-20 11:12:43,037 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/data/8ef3a9437/0f24c1d858ef49f9aad7ae5b044c67ac/FLAGf4bb37ac4 [2019-11-20 11:12:43,583 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 11:12:43,588 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/sv-benchmarks/c/array-memsafety/cstrcspn-alloca-1.i [2019-11-20 11:12:43,607 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/data/8ef3a9437/0f24c1d858ef49f9aad7ae5b044c67ac/FLAGf4bb37ac4 [2019-11-20 11:12:44,010 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/data/8ef3a9437/0f24c1d858ef49f9aad7ae5b044c67ac [2019-11-20 11:12:44,012 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 11:12:44,013 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 11:12:44,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 11:12:44,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 11:12:44,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 11:12:44,018 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:44" (1/1) ... [2019-11-20 11:12:44,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@166423e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44, skipping insertion in model container [2019-11-20 11:12:44,021 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:44" (1/1) ... [2019-11-20 11:12:44,027 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 11:12:44,078 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 11:12:44,478 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:12:44,488 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 11:12:44,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:12:44,579 INFO L192 MainTranslator]: Completed translation [2019-11-20 11:12:44,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44 WrapperNode [2019-11-20 11:12:44,580 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 11:12:44,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 11:12:44,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 11:12:44,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 11:12:44,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2019-11-20 11:12:44,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2019-11-20 11:12:44,604 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2019-11-20 11:12:44,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2019-11-20 11:12:44,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2019-11-20 11:12:44,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2019-11-20 11:12:44,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... [2019-11-20 11:12:44,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 11:12:44,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 11:12:44,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 11:12:44,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 11:12:44,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 11:12:44,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 11:12:44,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 11:12:44,690 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 11:12:44,690 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 11:12:44,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 11:12:44,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 11:12:44,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 11:12:44,691 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcspn [2019-11-20 11:12:44,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 11:12:44,691 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 11:12:44,691 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 11:12:44,691 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 11:12:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 11:12:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 11:12:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 11:12:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 11:12:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 11:12:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 11:12:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 11:12:44,692 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 11:12:44,693 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 11:12:44,693 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 11:12:44,693 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 11:12:44,693 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 11:12:44,693 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 11:12:44,693 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 11:12:44,693 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 11:12:44,694 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 11:12:44,694 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 11:12:44,694 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 11:12:44,694 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 11:12:44,694 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 11:12:44,694 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 11:12:44,694 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 11:12:44,694 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 11:12:44,695 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 11:12:44,695 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 11:12:44,695 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 11:12:44,695 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 11:12:44,695 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 11:12:44,695 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 11:12:44,695 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 11:12:44,695 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 11:12:44,696 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 11:12:44,696 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 11:12:44,696 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 11:12:44,696 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 11:12:44,696 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 11:12:44,696 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 11:12:44,696 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 11:12:44,696 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 11:12:44,697 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 11:12:44,697 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 11:12:44,697 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 11:12:44,697 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 11:12:44,697 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 11:12:44,697 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 11:12:44,697 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 11:12:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 11:12:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 11:12:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 11:12:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 11:12:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 11:12:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 11:12:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 11:12:44,698 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 11:12:44,699 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 11:12:44,699 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 11:12:44,699 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 11:12:44,699 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 11:12:44,699 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 11:12:44,699 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 11:12:44,700 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 11:12:44,700 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 11:12:44,700 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 11:12:44,700 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 11:12:44,700 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 11:12:44,700 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 11:12:44,701 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 11:12:44,701 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 11:12:44,701 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 11:12:44,701 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 11:12:44,701 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 11:12:44,701 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 11:12:44,701 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 11:12:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 11:12:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 11:12:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 11:12:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 11:12:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 11:12:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 11:12:44,702 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 11:12:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 11:12:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 11:12:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 11:12:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 11:12:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 11:12:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 11:12:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 11:12:44,703 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 11:12:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 11:12:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 11:12:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 11:12:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 11:12:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 11:12:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 11:12:44,704 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 11:12:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 11:12:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 11:12:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 11:12:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 11:12:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 11:12:44,705 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 11:12:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 11:12:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 11:12:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 11:12:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 11:12:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-20 11:12:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcspn [2019-11-20 11:12:44,706 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-20 11:12:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 11:12:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 11:12:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-20 11:12:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 11:12:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 11:12:44,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 11:12:45,355 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 11:12:45,355 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 11:12:45,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:45 BoogieIcfgContainer [2019-11-20 11:12:45,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 11:12:45,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 11:12:45,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 11:12:45,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 11:12:45,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:12:44" (1/3) ... [2019-11-20 11:12:45,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589aea23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:45, skipping insertion in model container [2019-11-20 11:12:45,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:44" (2/3) ... [2019-11-20 11:12:45,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@589aea23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:45, skipping insertion in model container [2019-11-20 11:12:45,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:45" (3/3) ... [2019-11-20 11:12:45,363 INFO L109 eAbstractionObserver]: Analyzing ICFG cstrcspn-alloca-1.i [2019-11-20 11:12:45,371 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 11:12:45,378 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2019-11-20 11:12:45,388 INFO L249 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2019-11-20 11:12:45,403 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 11:12:45,403 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 11:12:45,404 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 11:12:45,404 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 11:12:45,404 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 11:12:45,404 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 11:12:45,404 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 11:12:45,404 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 11:12:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2019-11-20 11:12:45,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 11:12:45,423 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:45,423 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:45,424 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:12:45,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:45,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1274980559, now seen corresponding path program 1 times [2019-11-20 11:12:45,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:45,438 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [486325339] [2019-11-20 11:12:45,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:45,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 11:12:45,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:45,687 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:45,739 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [486325339] [2019-11-20 11:12:45,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:12:45,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 11:12:45,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455215724] [2019-11-20 11:12:45,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 11:12:45,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:45,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 11:12:45,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:12:45,762 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 6 states. [2019-11-20 11:12:45,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:45,913 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2019-11-20 11:12:45,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 11:12:45,916 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-20 11:12:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:45,926 INFO L225 Difference]: With dead ends: 83 [2019-11-20 11:12:45,926 INFO L226 Difference]: Without dead ends: 79 [2019-11-20 11:12:45,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:12:45,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-20 11:12:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2019-11-20 11:12:45,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 11:12:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2019-11-20 11:12:45,966 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2019-11-20 11:12:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:45,966 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2019-11-20 11:12:45,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 11:12:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2019-11-20 11:12:45,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 11:12:45,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:45,967 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:46,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:46,169 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:12:46,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:46,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1276827601, now seen corresponding path program 1 times [2019-11-20 11:12:46,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:46,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1792769122] [2019-11-20 11:12:46,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:46,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 11:12:46,357 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:46,398 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_25|], 1=[|v_#valid_37|]} [2019-11-20 11:12:46,409 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 11:12:46,420 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-20 11:12:46,420 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:46,451 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:46,468 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 11:12:46,468 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:46,504 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:46,505 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:12:46,505 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:13 [2019-11-20 11:12:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:46,533 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:46,640 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 11:12:46,649 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 11:12:46,650 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:46,662 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:46,664 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 11:12:46,665 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:46,681 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:46,682 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:12:46,682 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:21, output treesize:3 [2019-11-20 11:12:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:46,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1792769122] [2019-11-20 11:12:46,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:12:46,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 11:12:46,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892390248] [2019-11-20 11:12:46,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 11:12:46,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:46,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 11:12:46,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 11:12:46,695 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand 5 states. [2019-11-20 11:12:47,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:47,315 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2019-11-20 11:12:47,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 11:12:47,316 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-11-20 11:12:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:47,318 INFO L225 Difference]: With dead ends: 84 [2019-11-20 11:12:47,318 INFO L226 Difference]: Without dead ends: 84 [2019-11-20 11:12:47,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 11:12:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-20 11:12:47,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2019-11-20 11:12:47,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-20 11:12:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2019-11-20 11:12:47,327 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 11 [2019-11-20 11:12:47,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:47,327 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2019-11-20 11:12:47,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 11:12:47,328 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2019-11-20 11:12:47,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-20 11:12:47,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:47,328 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:47,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:47,531 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:12:47,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:47,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1276827600, now seen corresponding path program 1 times [2019-11-20 11:12:47,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:47,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1118421333] [2019-11-20 11:12:47,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:47,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:47,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 11:12:47,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:47,752 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 11:12:47,753 INFO L377 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 [2019-11-20 11:12:47,753 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:47,762 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:47,763 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:12:47,763 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2019-11-20 11:12:47,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:47,791 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:47,820 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1118421333] [2019-11-20 11:12:47,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:12:47,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 11:12:47,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220328663] [2019-11-20 11:12:47,821 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 11:12:47,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:47,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 11:12:47,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 11:12:47,822 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 4 states. [2019-11-20 11:12:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:47,971 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2019-11-20 11:12:47,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 11:12:47,972 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-11-20 11:12:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:47,974 INFO L225 Difference]: With dead ends: 62 [2019-11-20 11:12:47,974 INFO L226 Difference]: Without dead ends: 62 [2019-11-20 11:12:47,974 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 11:12:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-20 11:12:47,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-20 11:12:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 11:12:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2019-11-20 11:12:47,981 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 11 [2019-11-20 11:12:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:47,982 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2019-11-20 11:12:47,984 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 11:12:47,984 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2019-11-20 11:12:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 11:12:47,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:47,988 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:48,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:48,191 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:12:48,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:48,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1190586438, now seen corresponding path program 1 times [2019-11-20 11:12:48,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:48,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2096197822] [2019-11-20 11:12:48,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:48,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:12:48,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:48,429 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_28|], 1=[|v_#valid_47|]} [2019-11-20 11:12:48,463 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 11:12:48,465 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-20 11:12:48,465 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:48,482 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:48,491 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 11:12:48,492 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:48,508 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:48,508 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:12:48,509 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:26, output treesize:14 [2019-11-20 11:12:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:48,523 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:48,601 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 11:12:48,617 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 11:12:48,628 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 11:12:48,629 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:48,640 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:48,640 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-20 11:12:48,641 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2019-11-20 11:12:48,641 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:32, output treesize:11 [2019-11-20 11:12:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:48,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2096197822] [2019-11-20 11:12:48,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:12:48,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 11:12:48,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325649789] [2019-11-20 11:12:48,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 11:12:48,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:48,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 11:12:48,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:12:48,684 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 6 states. [2019-11-20 11:12:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:49,191 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2019-11-20 11:12:49,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:12:49,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-20 11:12:49,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:49,194 INFO L225 Difference]: With dead ends: 76 [2019-11-20 11:12:49,194 INFO L226 Difference]: Without dead ends: 76 [2019-11-20 11:12:49,194 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 11:12:49,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-20 11:12:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2019-11-20 11:12:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-20 11:12:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2019-11-20 11:12:49,203 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2019-11-20 11:12:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:49,203 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2019-11-20 11:12:49,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 11:12:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2019-11-20 11:12:49,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 11:12:49,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:49,204 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:49,406 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:49,406 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:12:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:49,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1190586490, now seen corresponding path program 1 times [2019-11-20 11:12:49,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:49,407 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [649711763] [2019-11-20 11:12:49,407 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:49,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 11:12:49,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:49,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:49,593 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:49,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [649711763] [2019-11-20 11:12:49,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:12:49,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 11:12:49,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896025758] [2019-11-20 11:12:49,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 11:12:49,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:49,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 11:12:49,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:12:49,626 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 6 states. [2019-11-20 11:12:49,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:49,714 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2019-11-20 11:12:49,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 11:12:49,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-20 11:12:49,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:49,716 INFO L225 Difference]: With dead ends: 81 [2019-11-20 11:12:49,716 INFO L226 Difference]: Without dead ends: 81 [2019-11-20 11:12:49,716 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:12:49,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-20 11:12:49,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2019-11-20 11:12:49,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-20 11:12:49,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2019-11-20 11:12:49,724 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 13 [2019-11-20 11:12:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:49,724 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2019-11-20 11:12:49,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 11:12:49,724 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2019-11-20 11:12:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 11:12:49,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:49,725 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:49,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:49,927 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:12:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:49,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1247844792, now seen corresponding path program 1 times [2019-11-20 11:12:49,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:49,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1029667203] [2019-11-20 11:12:49,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:50,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 11:12:50,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:50,106 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 11:12:50,107 INFO L377 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 11 [2019-11-20 11:12:50,107 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:50,113 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:50,114 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:12:50,114 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 11:12:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:50,125 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:50,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1029667203] [2019-11-20 11:12:50,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:12:50,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 11:12:50,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053557266] [2019-11-20 11:12:50,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 11:12:50,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:50,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 11:12:50,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 11:12:50,132 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 3 states. [2019-11-20 11:12:50,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:50,224 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2019-11-20 11:12:50,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 11:12:50,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-20 11:12:50,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:50,225 INFO L225 Difference]: With dead ends: 70 [2019-11-20 11:12:50,225 INFO L226 Difference]: Without dead ends: 70 [2019-11-20 11:12:50,226 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 11:12:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-20 11:12:50,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2019-11-20 11:12:50,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-20 11:12:50,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2019-11-20 11:12:50,231 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 13 [2019-11-20 11:12:50,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:50,232 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2019-11-20 11:12:50,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 11:12:50,232 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2019-11-20 11:12:50,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 11:12:50,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:50,233 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:50,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:50,442 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:12:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:50,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1247844793, now seen corresponding path program 1 times [2019-11-20 11:12:50,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:50,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1273236885] [2019-11-20 11:12:50,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:50,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:50,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:12:50,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:50,614 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:50,614 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 11:12:50,615 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:50,649 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-20 11:12:50,650 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:12:50,651 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2019-11-20 11:12:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:50,691 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:50,804 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1273236885] [2019-11-20 11:12:50,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:12:50,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 11:12:50,804 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791361027] [2019-11-20 11:12:50,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 11:12:50,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:50,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 11:12:50,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-20 11:12:50,805 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 7 states. [2019-11-20 11:12:51,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:51,309 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2019-11-20 11:12:51,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:12:51,310 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-11-20 11:12:51,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:51,311 INFO L225 Difference]: With dead ends: 81 [2019-11-20 11:12:51,311 INFO L226 Difference]: Without dead ends: 81 [2019-11-20 11:12:51,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-20 11:12:51,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-20 11:12:51,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2019-11-20 11:12:51,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-20 11:12:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2019-11-20 11:12:51,324 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 13 [2019-11-20 11:12:51,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:51,325 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2019-11-20 11:12:51,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 11:12:51,325 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2019-11-20 11:12:51,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 11:12:51,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:51,326 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:51,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:51,527 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:12:51,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:51,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1746526086, now seen corresponding path program 1 times [2019-11-20 11:12:51,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:51,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1660173385] [2019-11-20 11:12:51,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:51,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 11:12:51,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:51,695 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:51,696 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 11:12:51,696 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:51,727 INFO L567 ElimStorePlain]: treesize reduction 10, result has 69.7 percent of original size [2019-11-20 11:12:51,728 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:12:51,728 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:14 [2019-11-20 11:12:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:51,740 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:51,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:51,828 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1660173385] [2019-11-20 11:12:51,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:12:51,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 11:12:51,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573104530] [2019-11-20 11:12:51,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 11:12:51,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:51,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 11:12:51,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:12:51,829 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand 6 states. [2019-11-20 11:12:52,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:52,140 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2019-11-20 11:12:52,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:12:52,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-20 11:12:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:52,142 INFO L225 Difference]: With dead ends: 78 [2019-11-20 11:12:52,142 INFO L226 Difference]: Without dead ends: 78 [2019-11-20 11:12:52,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 11:12:52,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-20 11:12:52,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2019-11-20 11:12:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-20 11:12:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2019-11-20 11:12:52,148 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 14 [2019-11-20 11:12:52,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:52,148 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2019-11-20 11:12:52,148 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 11:12:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2019-11-20 11:12:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 11:12:52,149 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:52,150 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:52,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:52,353 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:12:52,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:52,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1874075756, now seen corresponding path program 1 times [2019-11-20 11:12:52,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:52,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [880690935] [2019-11-20 11:12:52,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:52,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:52,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 11:12:52,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:52,518 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_69|]} [2019-11-20 11:12:52,526 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 11:12:52,527 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-20 11:12:52,527 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:52,544 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:52,551 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 11:12:52,552 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:52,568 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:52,569 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:12:52,569 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2019-11-20 11:12:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:52,677 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:53,141 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 11:12:53,145 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 11:12:53,145 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:53,146 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:53,146 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-20 11:12:53,147 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:12:53,147 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2019-11-20 11:12:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:53,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [880690935] [2019-11-20 11:12:53,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:12:53,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-20 11:12:53,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253316145] [2019-11-20 11:12:53,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 11:12:53,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:53,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 11:12:53,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 11:12:53,152 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 10 states. [2019-11-20 11:12:54,141 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-20 11:12:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:54,800 INFO L93 Difference]: Finished difference Result 135 states and 158 transitions. [2019-11-20 11:12:54,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 11:12:54,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2019-11-20 11:12:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:54,802 INFO L225 Difference]: With dead ends: 135 [2019-11-20 11:12:54,802 INFO L226 Difference]: Without dead ends: 135 [2019-11-20 11:12:54,803 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-11-20 11:12:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-20 11:12:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 87. [2019-11-20 11:12:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-20 11:12:54,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 104 transitions. [2019-11-20 11:12:54,809 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 104 transitions. Word has length 15 [2019-11-20 11:12:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:54,809 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 104 transitions. [2019-11-20 11:12:54,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 11:12:54,810 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 104 transitions. [2019-11-20 11:12:54,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 11:12:54,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:54,810 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:55,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:55,011 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:12:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:55,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1524736785, now seen corresponding path program 1 times [2019-11-20 11:12:55,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:55,012 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1396723535] [2019-11-20 11:12:55,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:55,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 11:12:55,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:55,206 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:55,219 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2019-11-20 11:12:55,219 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:55,220 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:55,221 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:12:55,221 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:1 [2019-11-20 11:12:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:55,229 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1396723535] [2019-11-20 11:12:55,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:12:55,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-20 11:12:55,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5769852] [2019-11-20 11:12:55,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 11:12:55,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:55,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 11:12:55,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 11:12:55,230 INFO L87 Difference]: Start difference. First operand 87 states and 104 transitions. Second operand 5 states. [2019-11-20 11:12:55,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:55,411 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2019-11-20 11:12:55,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 11:12:55,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-11-20 11:12:55,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:55,413 INFO L225 Difference]: With dead ends: 85 [2019-11-20 11:12:55,414 INFO L226 Difference]: Without dead ends: 85 [2019-11-20 11:12:55,414 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 11:12:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-20 11:12:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2019-11-20 11:12:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-20 11:12:55,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2019-11-20 11:12:55,427 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 17 [2019-11-20 11:12:55,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:55,428 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2019-11-20 11:12:55,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 11:12:55,434 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2019-11-20 11:12:55,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 11:12:55,435 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:55,435 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:55,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:55,636 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:12:55,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:55,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1524736784, now seen corresponding path program 1 times [2019-11-20 11:12:55,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:55,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1812712222] [2019-11-20 11:12:55,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:55,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:55,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 11:12:55,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:55,865 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:56,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 11:12:56,111 INFO L377 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 12 treesize of output 10 [2019-11-20 11:12:56,112 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:12:56,124 INFO L377 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 16 treesize of output 12 [2019-11-20 11:12:56,125 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:12:56,137 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-11-20 11:12:56,138 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:12:56,182 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:56,183 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 3 xjuncts. [2019-11-20 11:12:56,184 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:43, output treesize:35 [2019-11-20 11:12:56,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:56,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1812712222] [2019-11-20 11:12:56,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:12:56,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 11:12:56,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225596753] [2019-11-20 11:12:56,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 11:12:56,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:56,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 11:12:56,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-20 11:12:56,363 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand 12 states. [2019-11-20 11:12:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:56,992 INFO L93 Difference]: Finished difference Result 122 states and 146 transitions. [2019-11-20 11:12:56,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 11:12:56,992 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-20 11:12:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:56,995 INFO L225 Difference]: With dead ends: 122 [2019-11-20 11:12:56,995 INFO L226 Difference]: Without dead ends: 122 [2019-11-20 11:12:56,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-11-20 11:12:56,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-11-20 11:12:56,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 85. [2019-11-20 11:12:56,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-20 11:12:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2019-11-20 11:12:57,000 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 17 [2019-11-20 11:12:57,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:57,001 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2019-11-20 11:12:57,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 11:12:57,001 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2019-11-20 11:12:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 11:12:57,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:57,002 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:57,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:57,202 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:12:57,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:57,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1869159940, now seen corresponding path program 1 times [2019-11-20 11:12:57,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:57,203 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [705631179] [2019-11-20 11:12:57,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:57,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:57,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 11:12:57,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:57,365 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:57,365 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 11:12:57,366 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:57,407 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-20 11:12:57,408 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:12:57,408 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2019-11-20 11:12:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:57,531 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:58,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [705631179] [2019-11-20 11:12:58,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:12:58,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-20 11:12:58,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222900130] [2019-11-20 11:12:58,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 11:12:58,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:58,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 11:12:58,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-20 11:12:58,132 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand 12 states. [2019-11-20 11:12:58,899 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2019-11-20 11:12:59,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:59,474 INFO L93 Difference]: Finished difference Result 102 states and 120 transitions. [2019-11-20 11:12:59,477 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 11:12:59,477 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-20 11:12:59,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:59,478 INFO L225 Difference]: With dead ends: 102 [2019-11-20 11:12:59,478 INFO L226 Difference]: Without dead ends: 102 [2019-11-20 11:12:59,479 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2019-11-20 11:12:59,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-20 11:12:59,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 82. [2019-11-20 11:12:59,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-20 11:12:59,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2019-11-20 11:12:59,483 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 17 [2019-11-20 11:12:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:59,484 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2019-11-20 11:12:59,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 11:12:59,484 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2019-11-20 11:12:59,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 11:12:59,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:59,485 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:59,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:59,690 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:12:59,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:59,691 INFO L82 PathProgramCache]: Analyzing trace with hash 63888821, now seen corresponding path program 1 times [2019-11-20 11:12:59,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:59,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [546945194] [2019-11-20 11:12:59,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:59,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 11:12:59,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:59,894 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 11:12:59,895 INFO L377 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 11 [2019-11-20 11:12:59,895 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:59,903 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:59,904 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 11:12:59,904 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 11:12:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:59,946 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:59,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [546945194] [2019-11-20 11:12:59,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:12:59,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 6] imperfect sequences [] total 6 [2019-11-20 11:12:59,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205451407] [2019-11-20 11:12:59,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 11:12:59,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:59,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 11:12:59,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-20 11:12:59,985 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand 7 states. [2019-11-20 11:13:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:13:00,160 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2019-11-20 11:13:00,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 11:13:00,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2019-11-20 11:13:00,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:13:00,162 INFO L225 Difference]: With dead ends: 83 [2019-11-20 11:13:00,162 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 11:13:00,162 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-20 11:13:00,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 11:13:00,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2019-11-20 11:13:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-20 11:13:00,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2019-11-20 11:13:00,165 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 21 [2019-11-20 11:13:00,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:13:00,166 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2019-11-20 11:13:00,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 11:13:00,166 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2019-11-20 11:13:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 11:13:00,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:13:00,167 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:13:00,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:00,368 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:13:00,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:13:00,368 INFO L82 PathProgramCache]: Analyzing trace with hash 63888822, now seen corresponding path program 1 times [2019-11-20 11:13:00,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:13:00,369 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [735096310] [2019-11-20 11:13:00,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:13:00,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 11:13:00,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:13:00,576 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:00,577 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 11:13:00,577 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:00,598 INFO L567 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2019-11-20 11:13:00,598 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:00,599 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2019-11-20 11:13:00,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:13:00,657 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:13:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:13:00,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [735096310] [2019-11-20 11:13:00,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:13:00,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 11:13:00,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474592582] [2019-11-20 11:13:00,904 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 11:13:00,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:13:00,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 11:13:00,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 11:13:00,905 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand 12 states. [2019-11-20 11:13:01,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:13:01,919 INFO L93 Difference]: Finished difference Result 128 states and 152 transitions. [2019-11-20 11:13:01,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 11:13:01,921 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2019-11-20 11:13:01,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:13:01,922 INFO L225 Difference]: With dead ends: 128 [2019-11-20 11:13:01,922 INFO L226 Difference]: Without dead ends: 128 [2019-11-20 11:13:01,923 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-11-20 11:13:01,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2019-11-20 11:13:01,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2019-11-20 11:13:01,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-20 11:13:01,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 94 transitions. [2019-11-20 11:13:01,926 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 94 transitions. Word has length 21 [2019-11-20 11:13:01,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:13:01,927 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 94 transitions. [2019-11-20 11:13:01,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 11:13:01,927 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 94 transitions. [2019-11-20 11:13:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 11:13:01,928 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:13:01,928 INFO L410 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] [2019-11-20 11:13:02,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:02,137 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:13:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:13:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1250379430, now seen corresponding path program 1 times [2019-11-20 11:13:02,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:13:02,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1903563491] [2019-11-20 11:13:02,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:13:02,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 11:13:02,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:13:02,319 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 11:13:02,320 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:02,321 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:02,322 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:02,322 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 11:13:02,407 INFO L343 Elim1Store]: treesize reduction 24, result has 56.4 percent of original size [2019-11-20 11:13:02,407 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 49 [2019-11-20 11:13:02,408 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:02,429 INFO L567 ElimStorePlain]: treesize reduction 4, result has 85.7 percent of original size [2019-11-20 11:13:02,430 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:02,431 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 11:13:02,431 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:24 [2019-11-20 11:13:02,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:02,444 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:02,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:02,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:02,502 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:02,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:02,541 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:04,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:13:04,603 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:13:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:13:09,162 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1903563491] [2019-11-20 11:13:09,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:13:09,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 4] imperfect sequences [] total 9 [2019-11-20 11:13:09,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765543789] [2019-11-20 11:13:09,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 11:13:09,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:13:09,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 11:13:09,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=61, Unknown=2, NotChecked=0, Total=90 [2019-11-20 11:13:09,163 INFO L87 Difference]: Start difference. First operand 78 states and 94 transitions. Second operand 10 states. [2019-11-20 11:13:24,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:13:24,028 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2019-11-20 11:13:24,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 11:13:24,029 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-20 11:13:24,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:13:24,030 INFO L225 Difference]: With dead ends: 77 [2019-11-20 11:13:24,030 INFO L226 Difference]: Without dead ends: 72 [2019-11-20 11:13:24,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=40, Invalid=90, Unknown=2, NotChecked=0, Total=132 [2019-11-20 11:13:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-20 11:13:24,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-11-20 11:13:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-20 11:13:24,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2019-11-20 11:13:24,033 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 23 [2019-11-20 11:13:24,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:13:24,033 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2019-11-20 11:13:24,033 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 11:13:24,033 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2019-11-20 11:13:24,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 11:13:24,034 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:13:24,034 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:13:24,234 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:24,235 INFO L410 AbstractCegarLoop]: === Iteration 16 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:13:24,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:13:24,235 INFO L82 PathProgramCache]: Analyzing trace with hash 330818202, now seen corresponding path program 2 times [2019-11-20 11:13:24,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:13:24,235 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1193109052] [2019-11-20 11:13:24,236 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:24,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 11:13:24,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 11:13:24,428 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 11:13:24,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:13:24,436 INFO L392 ElimStorePlain]: Different costs {0=[|v_#length_45|], 1=[|v_#valid_104|]} [2019-11-20 11:13:24,442 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 11:13:24,443 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2019-11-20 11:13:24,443 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:24,463 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:24,475 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 11:13:24,475 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:24,491 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:24,492 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:24,492 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2019-11-20 11:13:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:13:24,612 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:13:25,506 INFO L392 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2019-11-20 11:13:25,513 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 11:13:25,514 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:25,527 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:25,529 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 11:13:25,530 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:25,542 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:25,543 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:25,543 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:27, output treesize:10 [2019-11-20 11:13:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:13:25,629 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1193109052] [2019-11-20 11:13:25,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:13:25,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2019-11-20 11:13:25,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143798243] [2019-11-20 11:13:25,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 11:13:25,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:13:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 11:13:25,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-11-20 11:13:25,631 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand 15 states. [2019-11-20 11:13:27,600 WARN L191 SmtUtils]: Spent 857.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2019-11-20 11:13:30,357 WARN L191 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2019-11-20 11:13:31,049 WARN L191 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2019-11-20 11:13:31,432 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2019-11-20 11:13:31,897 WARN L191 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2019-11-20 11:13:32,227 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-11-20 11:13:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:13:32,650 INFO L93 Difference]: Finished difference Result 182 states and 214 transitions. [2019-11-20 11:13:32,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 11:13:32,652 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 23 [2019-11-20 11:13:32,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:13:32,654 INFO L225 Difference]: With dead ends: 182 [2019-11-20 11:13:32,654 INFO L226 Difference]: Without dead ends: 182 [2019-11-20 11:13:32,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2019-11-20 11:13:32,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-20 11:13:32,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 112. [2019-11-20 11:13:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-20 11:13:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 137 transitions. [2019-11-20 11:13:32,659 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 137 transitions. Word has length 23 [2019-11-20 11:13:32,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:13:32,659 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 137 transitions. [2019-11-20 11:13:32,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 11:13:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 137 transitions. [2019-11-20 11:13:32,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-20 11:13:32,660 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:13:32,660 INFO L410 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] [2019-11-20 11:13:32,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:32,861 INFO L410 AbstractCegarLoop]: === Iteration 17 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:13:32,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:13:32,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1590997555, now seen corresponding path program 1 times [2019-11-20 11:13:32,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:13:32,861 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [946606739] [2019-11-20 11:13:32,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:13:32,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 11:13:32,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:13:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:13:32,999 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:13:33,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:13:33,003 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [946606739] [2019-11-20 11:13:33,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:13:33,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 11:13:33,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514187030] [2019-11-20 11:13:33,003 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 11:13:33,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:13:33,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 11:13:33,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 11:13:33,004 INFO L87 Difference]: Start difference. First operand 112 states and 137 transitions. Second operand 3 states. [2019-11-20 11:13:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:13:33,011 INFO L93 Difference]: Finished difference Result 113 states and 138 transitions. [2019-11-20 11:13:33,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 11:13:33,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-20 11:13:33,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:13:33,013 INFO L225 Difference]: With dead ends: 113 [2019-11-20 11:13:33,013 INFO L226 Difference]: Without dead ends: 113 [2019-11-20 11:13:33,013 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 11:13:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-20 11:13:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-20 11:13:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-20 11:13:33,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 138 transitions. [2019-11-20 11:13:33,016 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 138 transitions. Word has length 25 [2019-11-20 11:13:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:13:33,017 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 138 transitions. [2019-11-20 11:13:33,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 11:13:33,017 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 138 transitions. [2019-11-20 11:13:33,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 11:13:33,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:13:33,018 INFO L410 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] [2019-11-20 11:13:33,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:33,222 INFO L410 AbstractCegarLoop]: === Iteration 18 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:13:33,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:13:33,222 INFO L82 PathProgramCache]: Analyzing trace with hash 53849226, now seen corresponding path program 1 times [2019-11-20 11:13:33,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:13:33,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [441836010] [2019-11-20 11:13:33,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:13:33,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 11:13:33,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:13:33,465 INFO L377 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 12 treesize of output 8 [2019-11-20 11:13:33,465 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:33,471 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:33,471 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:33,471 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2019-11-20 11:13:33,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:13:33,606 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:13:33,620 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:33,723 INFO L377 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 16 treesize of output 14 [2019-11-20 11:13:33,726 INFO L377 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 29 treesize of output 27 [2019-11-20 11:13:33,727 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-11-20 11:13:33,731 INFO L567 ElimStorePlain]: treesize reduction 7, result has 46.2 percent of original size [2019-11-20 11:13:33,731 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:33,733 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:33,733 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:33,733 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:16, output treesize:6 [2019-11-20 11:13:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:13:33,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [441836010] [2019-11-20 11:13:33,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:13:33,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 9] imperfect sequences [] total 16 [2019-11-20 11:13:33,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448366138] [2019-11-20 11:13:33,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 11:13:33,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:13:33,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 11:13:33,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2019-11-20 11:13:33,741 INFO L87 Difference]: Start difference. First operand 113 states and 138 transitions. Second operand 16 states. [2019-11-20 11:13:34,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:13:34,172 INFO L93 Difference]: Finished difference Result 132 states and 156 transitions. [2019-11-20 11:13:34,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 11:13:34,173 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2019-11-20 11:13:34,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:13:34,173 INFO L225 Difference]: With dead ends: 132 [2019-11-20 11:13:34,174 INFO L226 Difference]: Without dead ends: 132 [2019-11-20 11:13:34,174 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2019-11-20 11:13:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-20 11:13:34,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2019-11-20 11:13:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-11-20 11:13:34,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 155 transitions. [2019-11-20 11:13:34,178 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 155 transitions. Word has length 27 [2019-11-20 11:13:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:13:34,178 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 155 transitions. [2019-11-20 11:13:34,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 11:13:34,179 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 155 transitions. [2019-11-20 11:13:34,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 11:13:34,180 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:13:34,180 INFO L410 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] [2019-11-20 11:13:34,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:34,383 INFO L410 AbstractCegarLoop]: === Iteration 19 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:13:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:13:34,383 INFO L82 PathProgramCache]: Analyzing trace with hash -763799224, now seen corresponding path program 1 times [2019-11-20 11:13:34,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:13:34,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1283865789] [2019-11-20 11:13:34,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:34,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:13:34,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 11:13:34,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:13:34,597 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:34,598 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 11:13:34,598 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:34,634 INFO L567 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2019-11-20 11:13:34,635 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:34,635 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2019-11-20 11:13:34,657 INFO L377 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 17 treesize of output 13 [2019-11-20 11:13:34,657 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:34,692 INFO L567 ElimStorePlain]: treesize reduction 20, result has 53.5 percent of original size [2019-11-20 11:13:34,693 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:34,693 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:23 [2019-11-20 11:13:35,037 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:35,037 INFO L377 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 24 treesize of output 24 [2019-11-20 11:13:35,038 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:35,044 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-20 11:13:35,063 INFO L567 ElimStorePlain]: treesize reduction 8, result has 70.4 percent of original size [2019-11-20 11:13:35,063 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:35,064 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:19 [2019-11-20 11:13:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:13:35,175 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:13:35,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:36,068 INFO L377 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 38 treesize of output 36 [2019-11-20 11:13:36,076 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 11:13:36,081 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 11:13:36,087 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2019-11-20 11:13:36,088 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:36,115 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:36,115 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:36,128 INFO L377 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 40 treesize of output 38 [2019-11-20 11:13:36,153 INFO L377 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 29 treesize of output 27 [2019-11-20 11:13:36,154 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2019-11-20 11:13:36,224 INFO L567 ElimStorePlain]: treesize reduction 7, result has 81.1 percent of original size [2019-11-20 11:13:36,224 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:36,244 INFO L377 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 40 treesize of output 38 [2019-11-20 11:13:36,279 INFO L377 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 29 treesize of output 27 [2019-11-20 11:13:36,281 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2019-11-20 11:13:36,356 INFO L567 ElimStorePlain]: treesize reduction 7, result has 81.1 percent of original size [2019-11-20 11:13:36,357 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:36,436 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:36,436 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-20 11:13:36,436 INFO L221 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:119, output treesize:83 [2019-11-20 11:13:36,742 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2019-11-20 11:13:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:13:36,754 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1283865789] [2019-11-20 11:13:36,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:13:36,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2019-11-20 11:13:36,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21899818] [2019-11-20 11:13:36,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-20 11:13:36,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:13:36,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-20 11:13:36,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2019-11-20 11:13:36,756 INFO L87 Difference]: Start difference. First operand 129 states and 155 transitions. Second operand 22 states. [2019-11-20 11:13:37,082 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-11-20 11:13:38,549 WARN L191 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2019-11-20 11:13:39,189 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2019-11-20 11:13:39,419 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2019-11-20 11:13:39,744 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-11-20 11:13:39,979 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2019-11-20 11:13:40,777 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2019-11-20 11:13:41,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:13:41,012 INFO L93 Difference]: Finished difference Result 169 states and 199 transitions. [2019-11-20 11:13:41,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 11:13:41,013 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2019-11-20 11:13:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:13:41,014 INFO L225 Difference]: With dead ends: 169 [2019-11-20 11:13:41,014 INFO L226 Difference]: Without dead ends: 169 [2019-11-20 11:13:41,015 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2019-11-20 11:13:41,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-11-20 11:13:41,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 141. [2019-11-20 11:13:41,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-11-20 11:13:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 171 transitions. [2019-11-20 11:13:41,020 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 171 transitions. Word has length 27 [2019-11-20 11:13:41,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:13:41,020 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 171 transitions. [2019-11-20 11:13:41,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-20 11:13:41,020 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 171 transitions. [2019-11-20 11:13:41,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 11:13:41,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:13:41,021 INFO L410 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] [2019-11-20 11:13:41,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:41,222 INFO L410 AbstractCegarLoop]: === Iteration 20 === [cstrcspnErr9REQUIRES_VIOLATION, cstrcspnErr4REQUIRES_VIOLATION, cstrcspnErr2REQUIRES_VIOLATION, cstrcspnErr8REQUIRES_VIOLATION, cstrcspnErr3REQUIRES_VIOLATION, cstrcspnErr6REQUIRES_VIOLATION, cstrcspnErr1REQUIRES_VIOLATION, cstrcspnErr7REQUIRES_VIOLATION, cstrcspnErr5REQUIRES_VIOLATION, cstrcspnErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2019-11-20 11:13:41,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:13:41,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1849780644, now seen corresponding path program 1 times [2019-11-20 11:13:41,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:13:41,222 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1812449362] [2019-11-20 11:13:41,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_03fa5e52-1627-413d-a7a4-e676902de545/bin/uautomizer/cvc4 Starting monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:41,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:13:41,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 11:13:41,412 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:13:41,427 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-20 11:13:41,427 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:41,453 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:41,454 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:41,454 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-20 11:13:41,478 INFO L377 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 12 treesize of output 8 [2019-11-20 11:13:41,479 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:41,491 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:41,491 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:41,491 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-11-20 11:13:41,517 INFO L377 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 21 treesize of output 20 [2019-11-20 11:13:41,518 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:13:41,529 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:41,529 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:13:41,529 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2019-11-20 11:13:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:13:41,655 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:13:41,674 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:48,167 WARN L191 SmtUtils]: Spent 6.13 s on a formula simplification that was a NOOP. DAG size: 23 [2019-11-20 11:13:48,167 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:13:48,168 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 148 [2019-11-20 11:13:48,168 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:48,168 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:48,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:48,169 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:48,170 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:48,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:48,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:48,172 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:48,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:48,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:48,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:13:48,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:48,404 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: no XNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:244) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:256) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 11:13:48,407 INFO L168 Benchmark]: Toolchain (without parser) took 64394.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 203.9 MB). Free memory was 939.3 MB in the beginning and 880.6 MB in the end (delta: 58.8 MB). Peak memory consumption was 262.7 MB. Max. memory is 11.5 GB. [2019-11-20 11:13:48,407 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:13:48,408 INFO L168 Benchmark]: CACSL2BoogieTranslator took 566.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -173.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-20 11:13:48,408 INFO L168 Benchmark]: Boogie Preprocessor took 55.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 11:13:48,409 INFO L168 Benchmark]: RCFGBuilder took 720.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 11.5 GB. [2019-11-20 11:13:48,410 INFO L168 Benchmark]: TraceAbstraction took 63049.34 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 880.6 MB in the end (delta: 172.0 MB). Peak memory consumption was 245.9 MB. Max. memory is 11.5 GB. [2019-11-20 11:13:48,411 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 566.24 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -173.2 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 55.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 720.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 63049.34 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 73.9 MB). Free memory was 1.1 GB in the beginning and 880.6 MB in the end (delta: 172.0 MB). Peak memory consumption was 245.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: no XNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: no XNF: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:244) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...