./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.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_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i -s /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 b873ab0fa5dbe521b35ba5285456d1a3fc5a6f41 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 03:15:54,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 03:15:54,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 03:15:54,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 03:15:54,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 03:15:54,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 03:15:54,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 03:15:54,330 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 03:15:54,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 03:15:54,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 03:15:54,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 03:15:54,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 03:15:54,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 03:15:54,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 03:15:54,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 03:15:54,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 03:15:54,346 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 03:15:54,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 03:15:54,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 03:15:54,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 03:15:54,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 03:15:54,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 03:15:54,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 03:15:54,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 03:15:54,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 03:15:54,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 03:15:54,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 03:15:54,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 03:15:54,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 03:15:54,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 03:15:54,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 03:15:54,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 03:15:54,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 03:15:54,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 03:15:54,371 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 03:15:54,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 03:15:54,372 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 03:15:54,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 03:15:54,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 03:15:54,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 03:15:54,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 03:15:54,375 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 03:15:54,400 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 03:15:54,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 03:15:54,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 03:15:54,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 03:15:54,402 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 03:15:54,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 03:15:54,402 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 03:15:54,402 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 03:15:54,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 03:15:54,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 03:15:54,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 03:15:54,403 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 03:15:54,403 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 03:15:54,403 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 03:15:54,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 03:15:54,404 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 03:15:54,404 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 03:15:54,404 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 03:15:54,404 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 03:15:54,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 03:15:54,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 03:15:54,405 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 03:15:54,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 03:15:54,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 03:15:54,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 03:15:54,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 03:15:54,406 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 03:15:54,406 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 03:15:54,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 03:15:54,406 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_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 -> b873ab0fa5dbe521b35ba5285456d1a3fc5a6f41 [2019-11-20 03:15:54,561 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 03:15:54,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 03:15:54,576 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 03:15:54,578 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 03:15:54,578 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 03:15:54,578 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/bin/uautomizer/../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2019-11-20 03:15:54,629 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/bin/uautomizer/data/549d3d373/1e57bef0a5e24edb9553f0b34463deb0/FLAG7f5926253 [2019-11-20 03:15:55,064 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 03:15:55,065 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2019-11-20 03:15:55,084 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/bin/uautomizer/data/549d3d373/1e57bef0a5e24edb9553f0b34463deb0/FLAG7f5926253 [2019-11-20 03:15:55,354 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/bin/uautomizer/data/549d3d373/1e57bef0a5e24edb9553f0b34463deb0 [2019-11-20 03:15:55,356 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 03:15:55,357 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 03:15:55,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 03:15:55,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 03:15:55,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 03:15:55,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:15:55" (1/1) ... [2019-11-20 03:15:55,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b6ce991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:15:55, skipping insertion in model container [2019-11-20 03:15:55,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:15:55" (1/1) ... [2019-11-20 03:15:55,370 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 03:15:55,403 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 03:15:55,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:15:55,813 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 03:15:55,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:15:55,933 INFO L192 MainTranslator]: Completed translation [2019-11-20 03:15:55,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:15:55 WrapperNode [2019-11-20 03:15:55,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 03:15:55,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 03:15:55,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 03:15:55,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 03:15:55,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:15:55" (1/1) ... [2019-11-20 03:15:55,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:15:55" (1/1) ... [2019-11-20 03:15:55,970 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:15:55" (1/1) ... [2019-11-20 03:15:55,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:15:55" (1/1) ... [2019-11-20 03:15:55,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:15:55" (1/1) ... [2019-11-20 03:15:56,003 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:15:55" (1/1) ... [2019-11-20 03:15:56,007 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:15:55" (1/1) ... [2019-11-20 03:15:56,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 03:15:56,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 03:15:56,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 03:15:56,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 03:15:56,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:15:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 03:15:56,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 03:15:56,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 03:15:56,097 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 03:15:56,097 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 03:15:56,098 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 03:15:56,098 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-20 03:15:56,098 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2019-11-20 03:15:56,099 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2019-11-20 03:15:56,099 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_append [2019-11-20 03:15:56,100 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 03:15:56,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 03:15:56,101 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 03:15:56,101 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 03:15:56,101 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 03:15:56,101 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 03:15:56,102 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 03:15:56,102 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 03:15:56,102 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 03:15:56,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 03:15:56,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 03:15:56,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 03:15:56,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 03:15:56,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 03:15:56,104 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 03:15:56,104 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 03:15:56,105 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 03:15:56,105 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 03:15:56,105 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 03:15:56,105 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 03:15:56,106 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 03:15:56,106 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 03:15:56,106 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 03:15:56,106 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 03:15:56,106 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 03:15:56,106 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 03:15:56,107 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 03:15:56,107 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 03:15:56,107 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 03:15:56,107 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 03:15:56,107 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 03:15:56,107 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 03:15:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 03:15:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 03:15:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 03:15:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 03:15:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 03:15:56,108 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 03:15:56,109 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 03:15:56,109 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 03:15:56,109 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 03:15:56,109 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 03:15:56,109 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 03:15:56,109 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 03:15:56,110 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 03:15:56,110 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 03:15:56,110 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 03:15:56,110 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 03:15:56,110 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 03:15:56,110 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 03:15:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 03:15:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 03:15:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 03:15:56,111 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 03:15:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 03:15:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 03:15:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 03:15:56,112 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 03:15:56,113 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 03:15:56,113 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 03:15:56,113 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 03:15:56,114 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 03:15:56,114 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 03:15:56,115 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 03:15:56,115 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 03:15:56,115 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 03:15:56,116 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 03:15:56,116 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 03:15:56,117 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 03:15:56,117 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 03:15:56,117 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 03:15:56,117 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 03:15:56,117 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 03:15:56,117 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 03:15:56,118 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 03:15:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 03:15:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 03:15:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 03:15:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 03:15:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 03:15:56,119 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 03:15:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 03:15:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 03:15:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 03:15:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 03:15:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 03:15:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 03:15:56,120 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 03:15:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 03:15:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 03:15:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 03:15:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 03:15:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 03:15:56,121 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 03:15:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 03:15:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 03:15:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 03:15:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 03:15:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 03:15:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 03:15:56,122 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 03:15:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 03:15:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 03:15:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 03:15:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 03:15:56,123 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 03:15:56,124 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 03:15:56,124 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 03:15:56,125 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-20 03:15:56,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 03:15:56,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 03:15:56,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 03:15:56,125 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2019-11-20 03:15:56,126 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2019-11-20 03:15:56,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 03:15:56,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 03:15:56,126 INFO L130 BoogieDeclarations]: Found specification of procedure dll_append [2019-11-20 03:15:56,126 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 03:15:56,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 03:15:56,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 03:15:56,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 03:15:56,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 03:15:56,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 03:15:56,645 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 03:15:57,140 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 03:15:57,141 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 03:15:57,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:15:57 BoogieIcfgContainer [2019-11-20 03:15:57,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 03:15:57,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 03:15:57,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 03:15:57,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 03:15:57,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 03:15:55" (1/3) ... [2019-11-20 03:15:57,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16635e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:15:57, skipping insertion in model container [2019-11-20 03:15:57,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:15:55" (2/3) ... [2019-11-20 03:15:57,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16635e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:15:57, skipping insertion in model container [2019-11-20 03:15:57,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:15:57" (3/3) ... [2019-11-20 03:15:57,151 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2n_append_unequal.i [2019-11-20 03:15:57,161 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 03:15:57,172 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 46 error locations. [2019-11-20 03:15:57,185 INFO L249 AbstractCegarLoop]: Starting to check reachability of 46 error locations. [2019-11-20 03:15:57,201 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 03:15:57,201 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 03:15:57,201 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 03:15:57,201 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 03:15:57,201 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 03:15:57,201 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 03:15:57,201 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 03:15:57,202 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 03:15:57,221 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states. [2019-11-20 03:15:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 03:15:57,229 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:15:57,230 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:15:57,230 INFO L410 AbstractCegarLoop]: === Iteration 1 === [dll_createErr4REQUIRES_VIOLATION, dll_createErr2REQUIRES_VIOLATION, dll_createErr3REQUIRES_VIOLATION, dll_createErr1REQUIRES_VIOLATION, dll_createErr0REQUIRES_VIOLATION, dll_createErr5REQUIRES_VIOLATION, dll_appendErr7REQUIRES_VIOLATION, dll_appendErr6REQUIRES_VIOLATION, dll_appendErr5REQUIRES_VIOLATION, dll_appendErr9REQUIRES_VIOLATION, dll_appendErr8REQUIRES_VIOLATION, dll_appendErr12REQUIRES_VIOLATION, dll_appendErr1REQUIRES_VIOLATION, dll_appendErr11REQUIRES_VIOLATION, dll_appendErr0REQUIRES_VIOLATION, dll_appendErr10REQUIRES_VIOLATION, dll_appendErr4REQUIRES_VIOLATION, dll_appendErr3REQUIRES_VIOLATION, dll_appendErr13REQUIRES_VIOLATION, dll_appendErr2REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:15:57,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:15:57,235 INFO L82 PathProgramCache]: Analyzing trace with hash -286721402, now seen corresponding path program 1 times [2019-11-20 03:15:57,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:15:57,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [297017540] [2019-11-20 03:15:57,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 03:15:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:15:57,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 03:15:57,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:15:57,542 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 03:15:57,542 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:15:57,549 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:15:57,550 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:15:57,550 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 03:15:57,560 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 03:15:57,560 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:15:57,576 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 03:15:57,577 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [297017540] [2019-11-20 03:15:57,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:15:57,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 03:15:57,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100177999] [2019-11-20 03:15:57,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 03:15:57,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:15:57,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 03:15:57,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 03:15:57,595 INFO L87 Difference]: Start difference. First operand 124 states. Second operand 3 states. [2019-11-20 03:15:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:15:57,836 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2019-11-20 03:15:57,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 03:15:57,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-20 03:15:57,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:15:57,852 INFO L225 Difference]: With dead ends: 121 [2019-11-20 03:15:57,852 INFO L226 Difference]: Without dead ends: 114 [2019-11-20 03:15:57,854 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 03:15:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-20 03:15:57,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2019-11-20 03:15:57,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-11-20 03:15:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2019-11-20 03:15:57,902 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 13 [2019-11-20 03:15:57,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:15:57,902 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2019-11-20 03:15:57,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 03:15:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2019-11-20 03:15:57,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 03:15:57,903 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:15:57,903 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:15:58,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:15:58,104 INFO L410 AbstractCegarLoop]: === Iteration 2 === [dll_createErr4REQUIRES_VIOLATION, dll_createErr2REQUIRES_VIOLATION, dll_createErr3REQUIRES_VIOLATION, dll_createErr1REQUIRES_VIOLATION, dll_createErr0REQUIRES_VIOLATION, dll_createErr5REQUIRES_VIOLATION, dll_appendErr7REQUIRES_VIOLATION, dll_appendErr6REQUIRES_VIOLATION, dll_appendErr5REQUIRES_VIOLATION, dll_appendErr9REQUIRES_VIOLATION, dll_appendErr8REQUIRES_VIOLATION, dll_appendErr12REQUIRES_VIOLATION, dll_appendErr1REQUIRES_VIOLATION, dll_appendErr11REQUIRES_VIOLATION, dll_appendErr0REQUIRES_VIOLATION, dll_appendErr10REQUIRES_VIOLATION, dll_appendErr4REQUIRES_VIOLATION, dll_appendErr3REQUIRES_VIOLATION, dll_appendErr13REQUIRES_VIOLATION, dll_appendErr2REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:15:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:15:58,105 INFO L82 PathProgramCache]: Analyzing trace with hash -286721401, now seen corresponding path program 1 times [2019-11-20 03:15:58,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:15:58,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1247063466] [2019-11-20 03:15:58,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 03:15:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:15:58,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 03:15:58,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:15:58,339 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 03:15:58,339 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:15:58,346 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:15:58,346 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:15:58,347 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 03:15:58,357 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 03:15:58,357 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:15:58,417 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 03:15:58,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1247063466] [2019-11-20 03:15:58,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:15:58,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 03:15:58,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923056918] [2019-11-20 03:15:58,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 03:15:58,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:15:58,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 03:15:58,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 03:15:58,420 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand 4 states. [2019-11-20 03:15:58,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:15:58,806 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2019-11-20 03:15:58,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 03:15:58,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-20 03:15:58,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:15:58,811 INFO L225 Difference]: With dead ends: 111 [2019-11-20 03:15:58,811 INFO L226 Difference]: Without dead ends: 111 [2019-11-20 03:15:58,812 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 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 03:15:58,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-20 03:15:58,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-11-20 03:15:58,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-20 03:15:58,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 118 transitions. [2019-11-20 03:15:58,836 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 118 transitions. Word has length 13 [2019-11-20 03:15:58,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:15:58,836 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 118 transitions. [2019-11-20 03:15:58,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 03:15:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 118 transitions. [2019-11-20 03:15:58,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 03:15:58,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:15:58,840 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] [2019-11-20 03:15:59,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:15:59,042 INFO L410 AbstractCegarLoop]: === Iteration 3 === [dll_createErr4REQUIRES_VIOLATION, dll_createErr2REQUIRES_VIOLATION, dll_createErr3REQUIRES_VIOLATION, dll_createErr1REQUIRES_VIOLATION, dll_createErr0REQUIRES_VIOLATION, dll_createErr5REQUIRES_VIOLATION, dll_appendErr7REQUIRES_VIOLATION, dll_appendErr6REQUIRES_VIOLATION, dll_appendErr5REQUIRES_VIOLATION, dll_appendErr9REQUIRES_VIOLATION, dll_appendErr8REQUIRES_VIOLATION, dll_appendErr12REQUIRES_VIOLATION, dll_appendErr1REQUIRES_VIOLATION, dll_appendErr11REQUIRES_VIOLATION, dll_appendErr0REQUIRES_VIOLATION, dll_appendErr10REQUIRES_VIOLATION, dll_appendErr4REQUIRES_VIOLATION, dll_appendErr3REQUIRES_VIOLATION, dll_appendErr13REQUIRES_VIOLATION, dll_appendErr2REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:15:59,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:15:59,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1929696140, now seen corresponding path program 1 times [2019-11-20 03:15:59,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:15:59,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [518883712] [2019-11-20 03:15:59,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 03:15:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:15:59,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 03:15:59,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:15:59,289 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 03:15:59,289 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:15:59,292 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:15:59,292 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:15:59,292 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 03:15:59,323 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 03:15:59,323 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:15:59,400 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 03:15:59,401 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [518883712] [2019-11-20 03:15:59,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:15:59,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 03:15:59,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511822453] [2019-11-20 03:15:59,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 03:15:59,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:15:59,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 03:15:59,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 03:15:59,403 INFO L87 Difference]: Start difference. First operand 111 states and 118 transitions. Second operand 6 states. [2019-11-20 03:15:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:15:59,889 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2019-11-20 03:15:59,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 03:15:59,890 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-11-20 03:15:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:15:59,892 INFO L225 Difference]: With dead ends: 114 [2019-11-20 03:15:59,893 INFO L226 Difference]: Without dead ends: 114 [2019-11-20 03:15:59,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 03:15:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-20 03:15:59,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2019-11-20 03:15:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-20 03:15:59,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 116 transitions. [2019-11-20 03:15:59,903 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 116 transitions. Word has length 20 [2019-11-20 03:15:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:15:59,904 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 116 transitions. [2019-11-20 03:15:59,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 03:15:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 116 transitions. [2019-11-20 03:15:59,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 03:15:59,905 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:15:59,905 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] [2019-11-20 03:16:00,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:16:00,116 INFO L410 AbstractCegarLoop]: === Iteration 4 === [dll_createErr4REQUIRES_VIOLATION, dll_createErr2REQUIRES_VIOLATION, dll_createErr3REQUIRES_VIOLATION, dll_createErr1REQUIRES_VIOLATION, dll_createErr0REQUIRES_VIOLATION, dll_createErr5REQUIRES_VIOLATION, dll_appendErr7REQUIRES_VIOLATION, dll_appendErr6REQUIRES_VIOLATION, dll_appendErr5REQUIRES_VIOLATION, dll_appendErr9REQUIRES_VIOLATION, dll_appendErr8REQUIRES_VIOLATION, dll_appendErr12REQUIRES_VIOLATION, dll_appendErr1REQUIRES_VIOLATION, dll_appendErr11REQUIRES_VIOLATION, dll_appendErr0REQUIRES_VIOLATION, dll_appendErr10REQUIRES_VIOLATION, dll_appendErr4REQUIRES_VIOLATION, dll_appendErr3REQUIRES_VIOLATION, dll_appendErr13REQUIRES_VIOLATION, dll_appendErr2REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:16:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:16:00,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1929696141, now seen corresponding path program 1 times [2019-11-20 03:16:00,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:16:00,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [545910438] [2019-11-20 03:16:00,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 03:16:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:16:00,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 03:16:00,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:16:00,344 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 03:16:00,344 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:16:00,356 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:16:00,356 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:16:00,356 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 03:16:00,404 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 03:16:00,404 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:16:00,742 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 03:16:00,742 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [545910438] [2019-11-20 03:16:00,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:16:00,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 03:16:00,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744178506] [2019-11-20 03:16:00,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 03:16:00,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:16:00,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 03:16:00,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 03:16:00,744 INFO L87 Difference]: Start difference. First operand 109 states and 116 transitions. Second operand 10 states. [2019-11-20 03:16:01,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:16:01,814 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2019-11-20 03:16:01,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 03:16:01,816 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-11-20 03:16:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:16:01,817 INFO L225 Difference]: With dead ends: 112 [2019-11-20 03:16:01,818 INFO L226 Difference]: Without dead ends: 112 [2019-11-20 03:16:01,818 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 03:16:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-20 03:16:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2019-11-20 03:16:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-20 03:16:01,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2019-11-20 03:16:01,837 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 20 [2019-11-20 03:16:01,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:16:01,837 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2019-11-20 03:16:01,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 03:16:01,838 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2019-11-20 03:16:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 03:16:01,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:16:01,839 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 03:16:02,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:16:02,042 INFO L410 AbstractCegarLoop]: === Iteration 5 === [dll_createErr4REQUIRES_VIOLATION, dll_createErr2REQUIRES_VIOLATION, dll_createErr3REQUIRES_VIOLATION, dll_createErr1REQUIRES_VIOLATION, dll_createErr0REQUIRES_VIOLATION, dll_createErr5REQUIRES_VIOLATION, dll_appendErr7REQUIRES_VIOLATION, dll_appendErr6REQUIRES_VIOLATION, dll_appendErr5REQUIRES_VIOLATION, dll_appendErr9REQUIRES_VIOLATION, dll_appendErr8REQUIRES_VIOLATION, dll_appendErr12REQUIRES_VIOLATION, dll_appendErr1REQUIRES_VIOLATION, dll_appendErr11REQUIRES_VIOLATION, dll_appendErr0REQUIRES_VIOLATION, dll_appendErr10REQUIRES_VIOLATION, dll_appendErr4REQUIRES_VIOLATION, dll_appendErr3REQUIRES_VIOLATION, dll_appendErr13REQUIRES_VIOLATION, dll_appendErr2REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:16:02,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:16:02,042 INFO L82 PathProgramCache]: Analyzing trace with hash -559402102, now seen corresponding path program 1 times [2019-11-20 03:16:02,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:16:02,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1899113385] [2019-11-20 03:16:02,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 03:16:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:16:02,200 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 03:16:02,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:16:02,220 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 03:16:02,220 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:16:02,233 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 03:16:02,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1899113385] [2019-11-20 03:16:02,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:16:02,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 03:16:02,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376932419] [2019-11-20 03:16:02,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 03:16:02,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:16:02,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 03:16:02,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 03:16:02,235 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand 3 states. [2019-11-20 03:16:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:16:02,283 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2019-11-20 03:16:02,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 03:16:02,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-20 03:16:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:16:02,289 INFO L225 Difference]: With dead ends: 117 [2019-11-20 03:16:02,289 INFO L226 Difference]: Without dead ends: 117 [2019-11-20 03:16:02,290 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 44 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 03:16:02,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-11-20 03:16:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2019-11-20 03:16:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-20 03:16:02,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2019-11-20 03:16:02,298 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 23 [2019-11-20 03:16:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:16:02,298 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2019-11-20 03:16:02,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 03:16:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2019-11-20 03:16:02,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 03:16:02,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:16:02,303 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] [2019-11-20 03:16:02,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:16:02,506 INFO L410 AbstractCegarLoop]: === Iteration 6 === [dll_createErr4REQUIRES_VIOLATION, dll_createErr2REQUIRES_VIOLATION, dll_createErr3REQUIRES_VIOLATION, dll_createErr1REQUIRES_VIOLATION, dll_createErr0REQUIRES_VIOLATION, dll_createErr5REQUIRES_VIOLATION, dll_appendErr7REQUIRES_VIOLATION, dll_appendErr6REQUIRES_VIOLATION, dll_appendErr5REQUIRES_VIOLATION, dll_appendErr9REQUIRES_VIOLATION, dll_appendErr8REQUIRES_VIOLATION, dll_appendErr12REQUIRES_VIOLATION, dll_appendErr1REQUIRES_VIOLATION, dll_appendErr11REQUIRES_VIOLATION, dll_appendErr0REQUIRES_VIOLATION, dll_appendErr10REQUIRES_VIOLATION, dll_appendErr4REQUIRES_VIOLATION, dll_appendErr3REQUIRES_VIOLATION, dll_appendErr13REQUIRES_VIOLATION, dll_appendErr2REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:16:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:16:02,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1010985362, now seen corresponding path program 1 times [2019-11-20 03:16:02,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:16:02,507 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [433454116] [2019-11-20 03:16:02,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 03:16:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:16:02,674 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 03:16:02,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:16:02,692 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 03:16:02,692 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:16:02,754 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 03:16:02,755 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [433454116] [2019-11-20 03:16:02,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:16:02,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-20 03:16:02,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218717658] [2019-11-20 03:16:02,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 03:16:02,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:16:02,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 03:16:02,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-20 03:16:02,756 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand 7 states. [2019-11-20 03:16:02,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:16:02,787 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2019-11-20 03:16:02,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 03:16:02,788 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-11-20 03:16:02,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:16:02,789 INFO L225 Difference]: With dead ends: 117 [2019-11-20 03:16:02,789 INFO L226 Difference]: Without dead ends: 114 [2019-11-20 03:16:02,789 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-20 03:16:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-20 03:16:02,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2019-11-20 03:16:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-20 03:16:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2019-11-20 03:16:02,796 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 26 [2019-11-20 03:16:02,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:16:02,796 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2019-11-20 03:16:02,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 03:16:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2019-11-20 03:16:02,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 03:16:02,797 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:16:02,798 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:16:03,000 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:16:03,001 INFO L410 AbstractCegarLoop]: === Iteration 7 === [dll_createErr4REQUIRES_VIOLATION, dll_createErr2REQUIRES_VIOLATION, dll_createErr3REQUIRES_VIOLATION, dll_createErr1REQUIRES_VIOLATION, dll_createErr0REQUIRES_VIOLATION, dll_createErr5REQUIRES_VIOLATION, dll_appendErr7REQUIRES_VIOLATION, dll_appendErr6REQUIRES_VIOLATION, dll_appendErr5REQUIRES_VIOLATION, dll_appendErr9REQUIRES_VIOLATION, dll_appendErr8REQUIRES_VIOLATION, dll_appendErr12REQUIRES_VIOLATION, dll_appendErr1REQUIRES_VIOLATION, dll_appendErr11REQUIRES_VIOLATION, dll_appendErr0REQUIRES_VIOLATION, dll_appendErr10REQUIRES_VIOLATION, dll_appendErr4REQUIRES_VIOLATION, dll_appendErr3REQUIRES_VIOLATION, dll_appendErr13REQUIRES_VIOLATION, dll_appendErr2REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:16:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:16:03,001 INFO L82 PathProgramCache]: Analyzing trace with hash -2117841340, now seen corresponding path program 1 times [2019-11-20 03:16:03,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:16:03,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1159570006] [2019-11-20 03:16:03,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 03:16:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:16:03,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 03:16:03,269 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:16:03,277 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 03:16:03,277 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:16:03,279 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:16:03,279 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:16:03,279 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 03:16:03,365 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:16:03,365 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 12 treesize of output 28 [2019-11-20 03:16:03,365 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:16:03,380 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 03:16:03,381 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 03:16:03,381 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:11 [2019-11-20 03:16:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:16:03,397 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:16:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:16:03,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1159570006] [2019-11-20 03:16:03,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:16:03,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-20 03:16:03,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607701497] [2019-11-20 03:16:03,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 03:16:03,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:16:03,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 03:16:03,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-20 03:16:03,600 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 10 states. [2019-11-20 03:16:24,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:16:24,604 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2019-11-20 03:16:24,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 03:16:24,605 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2019-11-20 03:16:24,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:16:24,606 INFO L225 Difference]: With dead ends: 132 [2019-11-20 03:16:24,606 INFO L226 Difference]: Without dead ends: 132 [2019-11-20 03:16:24,607 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 66 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2019-11-20 03:16:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-20 03:16:24,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 112. [2019-11-20 03:16:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-11-20 03:16:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2019-11-20 03:16:24,618 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 38 [2019-11-20 03:16:24,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:16:24,618 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2019-11-20 03:16:24,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 03:16:24,618 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2019-11-20 03:16:24,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 03:16:24,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:16:24,620 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:16:24,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:16:24,821 INFO L410 AbstractCegarLoop]: === Iteration 8 === [dll_createErr4REQUIRES_VIOLATION, dll_createErr2REQUIRES_VIOLATION, dll_createErr3REQUIRES_VIOLATION, dll_createErr1REQUIRES_VIOLATION, dll_createErr0REQUIRES_VIOLATION, dll_createErr5REQUIRES_VIOLATION, dll_appendErr7REQUIRES_VIOLATION, dll_appendErr6REQUIRES_VIOLATION, dll_appendErr5REQUIRES_VIOLATION, dll_appendErr9REQUIRES_VIOLATION, dll_appendErr8REQUIRES_VIOLATION, dll_appendErr12REQUIRES_VIOLATION, dll_appendErr1REQUIRES_VIOLATION, dll_appendErr11REQUIRES_VIOLATION, dll_appendErr0REQUIRES_VIOLATION, dll_appendErr10REQUIRES_VIOLATION, dll_appendErr4REQUIRES_VIOLATION, dll_appendErr3REQUIRES_VIOLATION, dll_appendErr13REQUIRES_VIOLATION, dll_appendErr2REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:16:24,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:16:24,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2117841339, now seen corresponding path program 1 times [2019-11-20 03:16:24,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:16:24,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1594436685] [2019-11-20 03:16:24,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 03:16:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:16:25,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 03:16:25,090 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:16:25,100 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 03:16:25,100 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:16:25,107 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:16:25,109 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 03:16:25,110 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 03:16:25,115 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:16:25,116 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:16:25,116 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 03:16:25,293 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 03:16:25,295 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2019-11-20 03:16:25,296 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:16:25,317 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:16:25,333 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:16:25,333 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2019-11-20 03:16:25,334 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 03:16:25,342 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:16:25,342 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 03:16:25,343 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:20 [2019-11-20 03:16:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:16:25,385 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:16:25,483 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 03:16:25,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 03:16:25,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:16:25,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:16:25,661 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:16:25,663 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:16:25,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:16:25,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:16:25,666 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:16:25,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:16:28,785 WARN L191 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2019-11-20 03:16:28,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:16:31,604 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2019-11-20 03:16:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:16:38,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1594436685] [2019-11-20 03:16:38,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:16:38,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2019-11-20 03:16:38,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937294323] [2019-11-20 03:16:38,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 03:16:38,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:16:38,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 03:16:38,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=262, Unknown=1, NotChecked=0, Total=306 [2019-11-20 03:16:38,606 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 18 states. [2019-11-20 03:16:43,456 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv1 1) (select |c_#valid| c_node_create_~temp~0.base)) (= (_ bv0 32) c_node_create_~temp~0.offset) (exists ((|node_create_#t~malloc2.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |node_create_#t~malloc2.base|) (_ bv0 1)) (= |c_#length| (store |c_old(#length)| |node_create_#t~malloc2.base| (_ bv12 32))))) (= (bvadd (select |c_#length| c_node_create_~temp~0.base) (_ bv4294967284 32)) (_ bv0 32)) (forall ((v_dll_create_~head~0.base_BEFORE_CALL_6 (_ BitVec 32)) (|v_node_create_#t~malloc2.base_27| (_ BitVec 32)) (v_dll_create_~head~0.offset_BEFORE_CALL_4 (_ BitVec 32))) (let ((.cse0 (bvadd v_dll_create_~head~0.offset_BEFORE_CALL_4 (_ bv8 32))) (.cse1 (bvadd v_dll_create_~head~0.offset_BEFORE_CALL_4 (_ bv12 32)))) (or (not (= (select |c_#valid| |v_node_create_#t~malloc2.base_27|) (_ bv0 1))) (not (bvsle (_ bv0 32) .cse0)) (bvsle .cse1 (select (store |c_#length| |v_node_create_#t~malloc2.base_27| (_ bv12 32)) v_dll_create_~head~0.base_BEFORE_CALL_6)) (exists ((v_prenex_2 (_ BitVec 32))) (and (not (bvsle (bvadd v_dll_create_~head~0.offset_BEFORE_CALL_4 (_ bv12 32)) (select (store |c_old(#length)| v_prenex_2 (_ bv12 32)) v_dll_create_~head~0.base_BEFORE_CALL_6))) (= (_ bv0 1) (select |c_old(#valid)| v_prenex_2)))) (not (bvsle .cse0 .cse1)))))) is different from false [2019-11-20 03:16:46,856 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-11-20 03:17:05,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:17:05,144 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2019-11-20 03:17:05,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 03:17:05,146 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2019-11-20 03:17:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:17:05,147 INFO L225 Difference]: With dead ends: 131 [2019-11-20 03:17:05,147 INFO L226 Difference]: Without dead ends: 131 [2019-11-20 03:17:05,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=106, Invalid=546, Unknown=2, NotChecked=48, Total=702 [2019-11-20 03:17:05,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-20 03:17:05,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2019-11-20 03:17:05,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-11-20 03:17:05,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2019-11-20 03:17:05,154 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 38 [2019-11-20 03:17:05,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:17:05,154 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 119 transitions. [2019-11-20 03:17:05,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 03:17:05,154 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 119 transitions. [2019-11-20 03:17:05,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-20 03:17:05,155 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:17:05,156 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:17:05,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:17:05,356 INFO L410 AbstractCegarLoop]: === Iteration 9 === [dll_createErr4REQUIRES_VIOLATION, dll_createErr2REQUIRES_VIOLATION, dll_createErr3REQUIRES_VIOLATION, dll_createErr1REQUIRES_VIOLATION, dll_createErr0REQUIRES_VIOLATION, dll_createErr5REQUIRES_VIOLATION, dll_appendErr7REQUIRES_VIOLATION, dll_appendErr6REQUIRES_VIOLATION, dll_appendErr5REQUIRES_VIOLATION, dll_appendErr9REQUIRES_VIOLATION, dll_appendErr8REQUIRES_VIOLATION, dll_appendErr12REQUIRES_VIOLATION, dll_appendErr1REQUIRES_VIOLATION, dll_appendErr11REQUIRES_VIOLATION, dll_appendErr0REQUIRES_VIOLATION, dll_appendErr10REQUIRES_VIOLATION, dll_appendErr4REQUIRES_VIOLATION, dll_appendErr3REQUIRES_VIOLATION, dll_appendErr13REQUIRES_VIOLATION, dll_appendErr2REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:17:05,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:17:05,357 INFO L82 PathProgramCache]: Analyzing trace with hash 2144115864, now seen corresponding path program 1 times [2019-11-20 03:17:05,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:17:05,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [259089533] [2019-11-20 03:17:05,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 03:17:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:17:05,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 03:17:05,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:17:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:17:05,627 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:17:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 03:17:05,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [259089533] [2019-11-20 03:17:05,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:17:05,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-11-20 03:17:05,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627508000] [2019-11-20 03:17:05,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 03:17:05,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:17:05,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 03:17:05,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-20 03:17:05,760 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. Second operand 9 states. [2019-11-20 03:17:05,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:17:05,890 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2019-11-20 03:17:05,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 03:17:05,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2019-11-20 03:17:05,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:17:05,892 INFO L225 Difference]: With dead ends: 123 [2019-11-20 03:17:05,892 INFO L226 Difference]: Without dead ends: 120 [2019-11-20 03:17:05,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-20 03:17:05,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-20 03:17:05,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2019-11-20 03:17:05,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-20 03:17:05,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 121 transitions. [2019-11-20 03:17:05,898 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 121 transitions. Word has length 41 [2019-11-20 03:17:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:17:05,898 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 121 transitions. [2019-11-20 03:17:05,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 03:17:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 121 transitions. [2019-11-20 03:17:05,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-20 03:17:05,900 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:17:05,901 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:17:06,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:17:06,104 INFO L410 AbstractCegarLoop]: === Iteration 10 === [dll_createErr4REQUIRES_VIOLATION, dll_createErr2REQUIRES_VIOLATION, dll_createErr3REQUIRES_VIOLATION, dll_createErr1REQUIRES_VIOLATION, dll_createErr0REQUIRES_VIOLATION, dll_createErr5REQUIRES_VIOLATION, dll_appendErr7REQUIRES_VIOLATION, dll_appendErr6REQUIRES_VIOLATION, dll_appendErr5REQUIRES_VIOLATION, dll_appendErr9REQUIRES_VIOLATION, dll_appendErr8REQUIRES_VIOLATION, dll_appendErr12REQUIRES_VIOLATION, dll_appendErr1REQUIRES_VIOLATION, dll_appendErr11REQUIRES_VIOLATION, dll_appendErr0REQUIRES_VIOLATION, dll_appendErr10REQUIRES_VIOLATION, dll_appendErr4REQUIRES_VIOLATION, dll_appendErr3REQUIRES_VIOLATION, dll_appendErr13REQUIRES_VIOLATION, dll_appendErr2REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:17:06,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:17:06,104 INFO L82 PathProgramCache]: Analyzing trace with hash -811516718, now seen corresponding path program 2 times [2019-11-20 03:17:06,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:17:06,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1737973938] [2019-11-20 03:17:06,105 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 03:17:06,361 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:17:06,361 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:17:06,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 03:17:06,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:17:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 03:17:06,397 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:17:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-20 03:17:06,486 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1737973938] [2019-11-20 03:17:06,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:17:06,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-20 03:17:06,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651068822] [2019-11-20 03:17:06,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 03:17:06,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:17:06,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 03:17:06,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 03:17:06,487 INFO L87 Difference]: Start difference. First operand 113 states and 121 transitions. Second operand 7 states. [2019-11-20 03:17:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:17:06,695 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2019-11-20 03:17:06,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 03:17:06,696 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2019-11-20 03:17:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:17:06,697 INFO L225 Difference]: With dead ends: 113 [2019-11-20 03:17:06,697 INFO L226 Difference]: Without dead ends: 113 [2019-11-20 03:17:06,697 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-20 03:17:06,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-20 03:17:06,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-20 03:17:06,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-20 03:17:06,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 120 transitions. [2019-11-20 03:17:06,702 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 120 transitions. Word has length 56 [2019-11-20 03:17:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:17:06,702 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 120 transitions. [2019-11-20 03:17:06,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 03:17:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 120 transitions. [2019-11-20 03:17:06,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-20 03:17:06,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:17:06,704 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:17:06,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:17:06,906 INFO L410 AbstractCegarLoop]: === Iteration 11 === [dll_createErr4REQUIRES_VIOLATION, dll_createErr2REQUIRES_VIOLATION, dll_createErr3REQUIRES_VIOLATION, dll_createErr1REQUIRES_VIOLATION, dll_createErr0REQUIRES_VIOLATION, dll_createErr5REQUIRES_VIOLATION, dll_appendErr7REQUIRES_VIOLATION, dll_appendErr6REQUIRES_VIOLATION, dll_appendErr5REQUIRES_VIOLATION, dll_appendErr9REQUIRES_VIOLATION, dll_appendErr8REQUIRES_VIOLATION, dll_appendErr12REQUIRES_VIOLATION, dll_appendErr1REQUIRES_VIOLATION, dll_appendErr11REQUIRES_VIOLATION, dll_appendErr0REQUIRES_VIOLATION, dll_appendErr10REQUIRES_VIOLATION, dll_appendErr4REQUIRES_VIOLATION, dll_appendErr3REQUIRES_VIOLATION, dll_appendErr13REQUIRES_VIOLATION, dll_appendErr2REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, dll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:17:06,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:17:06,907 INFO L82 PathProgramCache]: Analyzing trace with hash 31218378, now seen corresponding path program 1 times [2019-11-20 03:17:06,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:17:06,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [373875458] [2019-11-20 03:17:06,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_12680fc6-0bc5-48c6-a931-c0e1c43b6f3e/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 03:17:07,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:17:07,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-20 03:17:07,424 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:17:07,430 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 03:17:07,430 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:17:07,434 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:17:07,434 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:17:07,434 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 03:17:07,657 INFO L343 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2019-11-20 03:17:07,657 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 49 [2019-11-20 03:17:07,658 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:17:07,684 INFO L567 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2019-11-20 03:17:07,684 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 03:17:07,684 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:20 [2019-11-20 03:17:07,827 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:17:07,828 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 50 [2019-11-20 03:17:07,828 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:17:07,857 INFO L567 ElimStorePlain]: treesize reduction 28, result has 41.7 percent of original size [2019-11-20 03:17:07,858 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 03:17:07,858 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:20 [2019-11-20 03:17:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-20 03:17:07,887 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:17:31,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:17:31,166 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Alternating quantifiers not yet supported at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 03:17:31,170 INFO L168 Benchmark]: Toolchain (without parser) took 95812.71 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 214.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -154.1 MB). Peak memory consumption was 60.3 MB. Max. memory is 11.5 GB. [2019-11-20 03:17:31,170 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:17:31,171 INFO L168 Benchmark]: CACSL2BoogieTranslator took 576.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -193.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-11-20 03:17:31,171 INFO L168 Benchmark]: Boogie Preprocessor took 85.61 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-11-20 03:17:31,172 INFO L168 Benchmark]: RCFGBuilder took 1121.81 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 70.7 MB). Peak memory consumption was 70.7 MB. Max. memory is 11.5 GB. [2019-11-20 03:17:31,172 INFO L168 Benchmark]: TraceAbstraction took 94025.68 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 48.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -32.9 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. [2019-11-20 03:17:31,175 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 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 576.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -193.3 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 85.61 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: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 1121.81 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: 70.7 MB). Peak memory consumption was 70.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 94025.68 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 48.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -32.9 MB). Peak memory consumption was 15.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...