./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.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_7721255b-2756-4675-b94d-1c6b39f97340/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/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 8e9bd4c45107b8bac8caf02aded500b0232909d1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 03:19:39,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 03:19:39,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 03:19:39,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 03:19:39,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 03:19:39,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 03:19:39,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 03:19:39,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 03:19:39,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 03:19:39,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 03:19:39,337 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 03:19:39,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 03:19:39,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 03:19:39,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 03:19:39,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 03:19:39,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 03:19:39,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 03:19:39,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 03:19:39,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 03:19:39,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 03:19:39,353 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 03:19:39,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 03:19:39,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 03:19:39,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 03:19:39,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 03:19:39,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 03:19:39,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 03:19:39,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 03:19:39,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 03:19:39,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 03:19:39,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 03:19:39,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 03:19:39,366 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 03:19:39,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 03:19:39,367 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 03:19:39,367 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 03:19:39,368 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 03:19:39,368 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 03:19:39,368 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 03:19:39,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 03:19:39,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 03:19:39,371 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 03:19:39,393 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 03:19:39,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 03:19:39,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 03:19:39,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 03:19:39,395 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 03:19:39,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 03:19:39,395 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 03:19:39,395 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 03:19:39,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 03:19:39,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 03:19:39,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 03:19:39,396 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 03:19:39,397 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 03:19:39,397 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 03:19:39,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 03:19:39,397 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 03:19:39,397 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 03:19:39,398 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 03:19:39,398 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 03:19:39,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 03:19:39,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 03:19:39,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 03:19:39,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 03:19:39,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 03:19:39,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 03:19:39,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 03:19:39,400 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 03:19:39,400 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 03:19:39,400 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 03:19:39,400 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_7721255b-2756-4675-b94d-1c6b39f97340/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 -> 8e9bd4c45107b8bac8caf02aded500b0232909d1 [2019-11-20 03:19:39,529 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 03:19:39,539 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 03:19:39,542 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 03:19:39,543 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 03:19:39,543 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 03:19:39,544 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/bin/uautomizer/../../sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2019-11-20 03:19:39,591 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/bin/uautomizer/data/862314540/0d0e370ae7cc4e0780b8fb2e3615ca11/FLAG55b223f1b [2019-11-20 03:19:40,055 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 03:19:40,055 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/sv-benchmarks/c/list-simple/sll2c_remove_all_reverse.i [2019-11-20 03:19:40,068 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/bin/uautomizer/data/862314540/0d0e370ae7cc4e0780b8fb2e3615ca11/FLAG55b223f1b [2019-11-20 03:19:40,082 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/bin/uautomizer/data/862314540/0d0e370ae7cc4e0780b8fb2e3615ca11 [2019-11-20 03:19:40,084 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 03:19:40,085 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 03:19:40,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 03:19:40,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 03:19:40,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 03:19:40,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:19:40" (1/1) ... [2019-11-20 03:19:40,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45912668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:40, skipping insertion in model container [2019-11-20 03:19:40,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:19:40" (1/1) ... [2019-11-20 03:19:40,099 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 03:19:40,138 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 03:19:40,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:19:40,565 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 03:19:40,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:19:40,676 INFO L192 MainTranslator]: Completed translation [2019-11-20 03:19:40,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:40 WrapperNode [2019-11-20 03:19:40,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 03:19:40,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 03:19:40,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 03:19:40,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 03:19:40,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:40" (1/1) ... [2019-11-20 03:19:40,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:40" (1/1) ... [2019-11-20 03:19:40,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:40" (1/1) ... [2019-11-20 03:19:40,708 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:40" (1/1) ... [2019-11-20 03:19:40,729 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:40" (1/1) ... [2019-11-20 03:19:40,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:40" (1/1) ... [2019-11-20 03:19:40,737 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:40" (1/1) ... [2019-11-20 03:19:40,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 03:19:40,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 03:19:40,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 03:19:40,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 03:19:40,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/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 03:19:40,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 03:19:40,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 03:19:40,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 03:19:40,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 03:19:40,813 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 03:19:40,813 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-20 03:19:40,813 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2019-11-20 03:19:40,813 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_remove_last [2019-11-20 03:19:40,813 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 03:19:40,814 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 03:19:40,814 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 03:19:40,814 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 03:19:40,814 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 03:19:40,814 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 03:19:40,814 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 03:19:40,815 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 03:19:40,815 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 03:19:40,815 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 03:19:40,815 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 03:19:40,815 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 03:19:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 03:19:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 03:19:40,816 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 03:19:40,817 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 03:19:40,817 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 03:19:40,817 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 03:19:40,817 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 03:19:40,817 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 03:19:40,817 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 03:19:40,818 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 03:19:40,818 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 03:19:40,818 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 03:19:40,818 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 03:19:40,818 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 03:19:40,819 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 03:19:40,819 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 03:19:40,819 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 03:19:40,819 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 03:19:40,819 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 03:19:40,819 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 03:19:40,820 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 03:19:40,820 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 03:19:40,820 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 03:19:40,820 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 03:19:40,820 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 03:19:40,820 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 03:19:40,821 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 03:19:40,821 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 03:19:40,821 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 03:19:40,821 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 03:19:40,821 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 03:19:40,821 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 03:19:40,822 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 03:19:40,822 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 03:19:40,822 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 03:19:40,822 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 03:19:40,822 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 03:19:40,822 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 03:19:40,822 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 03:19:40,822 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 03:19:40,823 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 03:19:40,823 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 03:19:40,823 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 03:19:40,823 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 03:19:40,823 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 03:19:40,823 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 03:19:40,823 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 03:19:40,823 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 03:19:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 03:19:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 03:19:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 03:19:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 03:19:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 03:19:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 03:19:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 03:19:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 03:19:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 03:19:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 03:19:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 03:19:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 03:19:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 03:19:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 03:19:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 03:19:40,826 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 03:19:40,826 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 03:19:40,826 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 03:19:40,826 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 03:19:40,826 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 03:19:40,826 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 03:19:40,826 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 03:19:40,826 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 03:19:40,827 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 03:19:40,827 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 03:19:40,827 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 03:19:40,827 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 03:19:40,827 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 03:19:40,827 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 03:19:40,827 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 03:19:40,827 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 03:19:40,828 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 03:19:40,828 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 03:19:40,828 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 03:19:40,828 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 03:19:40,828 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 03:19:40,828 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 03:19:40,828 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 03:19:40,828 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 03:19:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 03:19:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 03:19:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 03:19:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 03:19:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 03:19:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 03:19:40,829 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 03:19:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 03:19:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 03:19:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-20 03:19:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 03:19:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 03:19:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 03:19:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2019-11-20 03:19:40,830 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_remove_last [2019-11-20 03:19:40,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 03:19:40,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 03:19:40,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 03:19:40,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 03:19:40,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 03:19:40,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 03:19:40,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 03:19:40,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 03:19:41,139 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 03:19:41,598 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 03:19:41,598 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 03:19:41,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:19:41 BoogieIcfgContainer [2019-11-20 03:19:41,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 03:19:41,600 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 03:19:41,601 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 03:19:41,603 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 03:19:41,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 03:19:40" (1/3) ... [2019-11-20 03:19:41,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f60837f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:19:41, skipping insertion in model container [2019-11-20 03:19:41,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:19:40" (2/3) ... [2019-11-20 03:19:41,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f60837f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:19:41, skipping insertion in model container [2019-11-20 03:19:41,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:19:41" (3/3) ... [2019-11-20 03:19:41,606 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all_reverse.i [2019-11-20 03:19:41,615 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 03:19:41,621 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 41 error locations. [2019-11-20 03:19:41,631 INFO L249 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2019-11-20 03:19:41,648 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 03:19:41,648 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 03:19:41,648 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 03:19:41,649 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 03:19:41,649 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 03:19:41,649 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 03:19:41,649 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 03:19:41,649 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 03:19:41,672 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states. [2019-11-20 03:19:41,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 03:19:41,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:19:41,685 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:19:41,686 INFO L410 AbstractCegarLoop]: === Iteration 1 === [sll_circular_remove_lastErr0REQUIRES_VIOLATION, sll_circular_remove_lastErr13ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr21REQUIRES_VIOLATION, sll_circular_remove_lastErr1REQUIRES_VIOLATION, sll_circular_remove_lastErr22REQUIRES_VIOLATION, sll_circular_remove_lastErr3REQUIRES_VIOLATION, sll_circular_remove_lastErr2REQUIRES_VIOLATION, sll_circular_remove_lastErr4REQUIRES_VIOLATION, sll_circular_remove_lastErr27REQUIRES_VIOLATION, sll_circular_remove_lastErr5REQUIRES_VIOLATION, sll_circular_remove_lastErr26REQUIRES_VIOLATION, sll_circular_remove_lastErr23ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr7REQUIRES_VIOLATION, sll_circular_remove_lastErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr28REQUIRES_VIOLATION, sll_circular_remove_lastErr6REQUIRES_VIOLATION, sll_circular_remove_lastErr8REQUIRES_VIOLATION, sll_circular_remove_lastErr29REQUIRES_VIOLATION, sll_circular_remove_lastErr9REQUIRES_VIOLATION, sll_circular_remove_lastErr11REQUIRES_VIOLATION, sll_circular_remove_lastErr10REQUIRES_VIOLATION, sll_circular_remove_lastErr12ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr14ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr15REQUIRES_VIOLATION, sll_circular_remove_lastErr24ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr16REQUIRES_VIOLATION, sll_circular_remove_lastErr17REQUIRES_VIOLATION, sll_circular_remove_lastErr19REQUIRES_VIOLATION, sll_circular_remove_lastErr18REQUIRES_VIOLATION, sll_circular_remove_lastErr20REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:19:41,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:19:41,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1614276735, now seen corresponding path program 1 times [2019-11-20 03:19:41,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:19:41,702 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [146154589] [2019-11-20 03:19:41,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/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 03:19:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:19:41,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 03:19:41,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:19:42,001 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 03:19:42,001 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:19:42,008 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:19:42,008 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:19:42,008 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 03:19:42,016 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 03:19:42,017 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:19:42,031 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 03:19:42,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [146154589] [2019-11-20 03:19:42,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:19:42,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 03:19:42,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073135473] [2019-11-20 03:19:42,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 03:19:42,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:19:42,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 03:19:42,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 03:19:42,052 INFO L87 Difference]: Start difference. First operand 110 states. Second operand 3 states. [2019-11-20 03:19:42,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:19:42,247 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2019-11-20 03:19:42,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 03:19:42,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-20 03:19:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:19:42,258 INFO L225 Difference]: With dead ends: 108 [2019-11-20 03:19:42,258 INFO L226 Difference]: Without dead ends: 101 [2019-11-20 03:19:42,259 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 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 03:19:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-20 03:19:42,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2019-11-20 03:19:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-20 03:19:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2019-11-20 03:19:42,328 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 12 [2019-11-20 03:19:42,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:19:42,328 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2019-11-20 03:19:42,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 03:19:42,329 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2019-11-20 03:19:42,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 03:19:42,329 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:19:42,329 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:19:42,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:19:42,536 INFO L410 AbstractCegarLoop]: === Iteration 2 === [sll_circular_remove_lastErr0REQUIRES_VIOLATION, sll_circular_remove_lastErr13ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr21REQUIRES_VIOLATION, sll_circular_remove_lastErr1REQUIRES_VIOLATION, sll_circular_remove_lastErr22REQUIRES_VIOLATION, sll_circular_remove_lastErr3REQUIRES_VIOLATION, sll_circular_remove_lastErr2REQUIRES_VIOLATION, sll_circular_remove_lastErr4REQUIRES_VIOLATION, sll_circular_remove_lastErr27REQUIRES_VIOLATION, sll_circular_remove_lastErr5REQUIRES_VIOLATION, sll_circular_remove_lastErr26REQUIRES_VIOLATION, sll_circular_remove_lastErr23ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr7REQUIRES_VIOLATION, sll_circular_remove_lastErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr28REQUIRES_VIOLATION, sll_circular_remove_lastErr6REQUIRES_VIOLATION, sll_circular_remove_lastErr8REQUIRES_VIOLATION, sll_circular_remove_lastErr29REQUIRES_VIOLATION, sll_circular_remove_lastErr9REQUIRES_VIOLATION, sll_circular_remove_lastErr11REQUIRES_VIOLATION, sll_circular_remove_lastErr10REQUIRES_VIOLATION, sll_circular_remove_lastErr12ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr14ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr15REQUIRES_VIOLATION, sll_circular_remove_lastErr24ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr16REQUIRES_VIOLATION, sll_circular_remove_lastErr17REQUIRES_VIOLATION, sll_circular_remove_lastErr19REQUIRES_VIOLATION, sll_circular_remove_lastErr18REQUIRES_VIOLATION, sll_circular_remove_lastErr20REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:19:42,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:19:42,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1614276734, now seen corresponding path program 1 times [2019-11-20 03:19:42,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:19:42,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [588020095] [2019-11-20 03:19:42,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/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 03:19:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:19:42,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 03:19:42,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:19:42,745 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 03:19:42,745 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:19:42,753 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:19:42,754 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:19:42,754 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 03:19:42,765 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 03:19:42,765 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:19:42,805 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 03:19:42,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [588020095] [2019-11-20 03:19:42,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:19:42,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 03:19:42,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172962798] [2019-11-20 03:19:42,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 03:19:42,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:19:42,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 03:19:42,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 03:19:42,808 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand 4 states. [2019-11-20 03:19:43,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:19:43,160 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2019-11-20 03:19:43,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 03:19:43,162 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-20 03:19:43,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:19:43,163 INFO L225 Difference]: With dead ends: 99 [2019-11-20 03:19:43,163 INFO L226 Difference]: Without dead ends: 99 [2019-11-20 03:19:43,164 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 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 03:19:43,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-20 03:19:43,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-11-20 03:19:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-20 03:19:43,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2019-11-20 03:19:43,175 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 12 [2019-11-20 03:19:43,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:19:43,175 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2019-11-20 03:19:43,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 03:19:43,175 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2019-11-20 03:19:43,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 03:19:43,176 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:19:43,176 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:19:43,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:19:43,380 INFO L410 AbstractCegarLoop]: === Iteration 3 === [sll_circular_remove_lastErr0REQUIRES_VIOLATION, sll_circular_remove_lastErr13ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr21REQUIRES_VIOLATION, sll_circular_remove_lastErr1REQUIRES_VIOLATION, sll_circular_remove_lastErr22REQUIRES_VIOLATION, sll_circular_remove_lastErr3REQUIRES_VIOLATION, sll_circular_remove_lastErr2REQUIRES_VIOLATION, sll_circular_remove_lastErr4REQUIRES_VIOLATION, sll_circular_remove_lastErr27REQUIRES_VIOLATION, sll_circular_remove_lastErr5REQUIRES_VIOLATION, sll_circular_remove_lastErr26REQUIRES_VIOLATION, sll_circular_remove_lastErr23ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr7REQUIRES_VIOLATION, sll_circular_remove_lastErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr28REQUIRES_VIOLATION, sll_circular_remove_lastErr6REQUIRES_VIOLATION, sll_circular_remove_lastErr8REQUIRES_VIOLATION, sll_circular_remove_lastErr29REQUIRES_VIOLATION, sll_circular_remove_lastErr9REQUIRES_VIOLATION, sll_circular_remove_lastErr11REQUIRES_VIOLATION, sll_circular_remove_lastErr10REQUIRES_VIOLATION, sll_circular_remove_lastErr12ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr14ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr15REQUIRES_VIOLATION, sll_circular_remove_lastErr24ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr16REQUIRES_VIOLATION, sll_circular_remove_lastErr17REQUIRES_VIOLATION, sll_circular_remove_lastErr19REQUIRES_VIOLATION, sll_circular_remove_lastErr18REQUIRES_VIOLATION, sll_circular_remove_lastErr20REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:19:43,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:19:43,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1738238402, now seen corresponding path program 1 times [2019-11-20 03:19:43,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:19:43,381 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1872059111] [2019-11-20 03:19:43,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/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 03:19:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:19:43,605 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 03:19:43,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:19:43,634 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 03:19:43,634 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:19:43,686 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 03:19:43,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1872059111] [2019-11-20 03:19:43,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:19:43,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-20 03:19:43,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149075474] [2019-11-20 03:19:43,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 03:19:43,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:19:43,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 03:19:43,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 03:19:43,689 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 8 states. [2019-11-20 03:19:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:19:43,775 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2019-11-20 03:19:43,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 03:19:43,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-20 03:19:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:19:43,777 INFO L225 Difference]: With dead ends: 106 [2019-11-20 03:19:43,777 INFO L226 Difference]: Without dead ends: 106 [2019-11-20 03:19:43,778 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 03:19:43,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-20 03:19:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2019-11-20 03:19:43,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-20 03:19:43,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2019-11-20 03:19:43,789 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 19 [2019-11-20 03:19:43,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:19:43,790 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2019-11-20 03:19:43,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 03:19:43,790 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2019-11-20 03:19:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 03:19:43,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:19:43,791 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:19:43,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:19:43,997 INFO L410 AbstractCegarLoop]: === Iteration 4 === [sll_circular_remove_lastErr0REQUIRES_VIOLATION, sll_circular_remove_lastErr13ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr21REQUIRES_VIOLATION, sll_circular_remove_lastErr1REQUIRES_VIOLATION, sll_circular_remove_lastErr22REQUIRES_VIOLATION, sll_circular_remove_lastErr3REQUIRES_VIOLATION, sll_circular_remove_lastErr2REQUIRES_VIOLATION, sll_circular_remove_lastErr4REQUIRES_VIOLATION, sll_circular_remove_lastErr27REQUIRES_VIOLATION, sll_circular_remove_lastErr5REQUIRES_VIOLATION, sll_circular_remove_lastErr26REQUIRES_VIOLATION, sll_circular_remove_lastErr23ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr7REQUIRES_VIOLATION, sll_circular_remove_lastErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr28REQUIRES_VIOLATION, sll_circular_remove_lastErr6REQUIRES_VIOLATION, sll_circular_remove_lastErr8REQUIRES_VIOLATION, sll_circular_remove_lastErr29REQUIRES_VIOLATION, sll_circular_remove_lastErr9REQUIRES_VIOLATION, sll_circular_remove_lastErr11REQUIRES_VIOLATION, sll_circular_remove_lastErr10REQUIRES_VIOLATION, sll_circular_remove_lastErr12ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr14ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr15REQUIRES_VIOLATION, sll_circular_remove_lastErr24ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr16REQUIRES_VIOLATION, sll_circular_remove_lastErr17REQUIRES_VIOLATION, sll_circular_remove_lastErr19REQUIRES_VIOLATION, sll_circular_remove_lastErr18REQUIRES_VIOLATION, sll_circular_remove_lastErr20REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:19:43,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:19:43,998 INFO L82 PathProgramCache]: Analyzing trace with hash -771999937, now seen corresponding path program 1 times [2019-11-20 03:19:43,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:19:43,999 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [262626002] [2019-11-20 03:19:44,000 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/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 03:19:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:19:44,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 03:19:44,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:19:44,286 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 03:19:44,286 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:19:44,288 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:19:44,289 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:19:44,289 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 03:19:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 03:19:44,319 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:19:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 03:19:44,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [262626002] [2019-11-20 03:19:44,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:19:44,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 03:19:44,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11141038] [2019-11-20 03:19:44,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 03:19:44,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:19:44,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 03:19:44,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 03:19:44,377 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand 6 states. [2019-11-20 03:19:44,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:19:44,832 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2019-11-20 03:19:44,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 03:19:44,833 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-11-20 03:19:44,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:19:44,836 INFO L225 Difference]: With dead ends: 100 [2019-11-20 03:19:44,836 INFO L226 Difference]: Without dead ends: 100 [2019-11-20 03:19:44,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 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 03:19:44,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-20 03:19:44,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-11-20 03:19:44,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-20 03:19:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2019-11-20 03:19:44,843 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 28 [2019-11-20 03:19:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:19:44,844 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2019-11-20 03:19:44,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 03:19:44,844 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2019-11-20 03:19:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 03:19:44,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:19:44,845 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:19:45,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:19:45,056 INFO L410 AbstractCegarLoop]: === Iteration 5 === [sll_circular_remove_lastErr0REQUIRES_VIOLATION, sll_circular_remove_lastErr13ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr21REQUIRES_VIOLATION, sll_circular_remove_lastErr1REQUIRES_VIOLATION, sll_circular_remove_lastErr22REQUIRES_VIOLATION, sll_circular_remove_lastErr3REQUIRES_VIOLATION, sll_circular_remove_lastErr2REQUIRES_VIOLATION, sll_circular_remove_lastErr4REQUIRES_VIOLATION, sll_circular_remove_lastErr27REQUIRES_VIOLATION, sll_circular_remove_lastErr5REQUIRES_VIOLATION, sll_circular_remove_lastErr26REQUIRES_VIOLATION, sll_circular_remove_lastErr23ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr7REQUIRES_VIOLATION, sll_circular_remove_lastErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr28REQUIRES_VIOLATION, sll_circular_remove_lastErr6REQUIRES_VIOLATION, sll_circular_remove_lastErr8REQUIRES_VIOLATION, sll_circular_remove_lastErr29REQUIRES_VIOLATION, sll_circular_remove_lastErr9REQUIRES_VIOLATION, sll_circular_remove_lastErr11REQUIRES_VIOLATION, sll_circular_remove_lastErr10REQUIRES_VIOLATION, sll_circular_remove_lastErr12ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr14ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr15REQUIRES_VIOLATION, sll_circular_remove_lastErr24ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr16REQUIRES_VIOLATION, sll_circular_remove_lastErr17REQUIRES_VIOLATION, sll_circular_remove_lastErr19REQUIRES_VIOLATION, sll_circular_remove_lastErr18REQUIRES_VIOLATION, sll_circular_remove_lastErr20REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:19:45,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:19:45,057 INFO L82 PathProgramCache]: Analyzing trace with hash -771999936, now seen corresponding path program 1 times [2019-11-20 03:19:45,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:19:45,057 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1488343391] [2019-11-20 03:19:45,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/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 03:19:45,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:19:45,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 03:19:45,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:19:45,281 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 03:19:45,281 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:19:45,293 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:19:45,293 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:19:45,293 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 03:19:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 03:19:45,378 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:19:45,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 03:19:45,686 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1488343391] [2019-11-20 03:19:45,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:19:45,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 03:19:45,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957440277] [2019-11-20 03:19:45,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 03:19:45,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:19:45,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 03:19:45,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 03:19:45,688 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 10 states. [2019-11-20 03:19:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:19:46,560 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2019-11-20 03:19:46,560 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 03:19:46,560 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-11-20 03:19:46,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:19:46,562 INFO L225 Difference]: With dead ends: 99 [2019-11-20 03:19:46,562 INFO L226 Difference]: Without dead ends: 99 [2019-11-20 03:19:46,562 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 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 03:19:46,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-20 03:19:46,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-11-20 03:19:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-20 03:19:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2019-11-20 03:19:46,570 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 28 [2019-11-20 03:19:46,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:19:46,570 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2019-11-20 03:19:46,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 03:19:46,570 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2019-11-20 03:19:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 03:19:46,571 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:19:46,571 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:19:46,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:19:46,777 INFO L410 AbstractCegarLoop]: === Iteration 6 === [sll_circular_remove_lastErr0REQUIRES_VIOLATION, sll_circular_remove_lastErr13ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr21REQUIRES_VIOLATION, sll_circular_remove_lastErr1REQUIRES_VIOLATION, sll_circular_remove_lastErr22REQUIRES_VIOLATION, sll_circular_remove_lastErr3REQUIRES_VIOLATION, sll_circular_remove_lastErr2REQUIRES_VIOLATION, sll_circular_remove_lastErr4REQUIRES_VIOLATION, sll_circular_remove_lastErr27REQUIRES_VIOLATION, sll_circular_remove_lastErr5REQUIRES_VIOLATION, sll_circular_remove_lastErr26REQUIRES_VIOLATION, sll_circular_remove_lastErr23ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr7REQUIRES_VIOLATION, sll_circular_remove_lastErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr28REQUIRES_VIOLATION, sll_circular_remove_lastErr6REQUIRES_VIOLATION, sll_circular_remove_lastErr8REQUIRES_VIOLATION, sll_circular_remove_lastErr29REQUIRES_VIOLATION, sll_circular_remove_lastErr9REQUIRES_VIOLATION, sll_circular_remove_lastErr11REQUIRES_VIOLATION, sll_circular_remove_lastErr10REQUIRES_VIOLATION, sll_circular_remove_lastErr12ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr14ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr15REQUIRES_VIOLATION, sll_circular_remove_lastErr24ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr16REQUIRES_VIOLATION, sll_circular_remove_lastErr17REQUIRES_VIOLATION, sll_circular_remove_lastErr19REQUIRES_VIOLATION, sll_circular_remove_lastErr18REQUIRES_VIOLATION, sll_circular_remove_lastErr20REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:19:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:19:46,777 INFO L82 PathProgramCache]: Analyzing trace with hash 899872780, now seen corresponding path program 1 times [2019-11-20 03:19:46,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:19:46,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2101420315] [2019-11-20 03:19:46,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/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 03:19:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:19:46,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 03:19:46,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:19:46,983 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 03:19:46,983 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:19:46,985 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:19:46,986 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:19:46,986 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 03:19:47,067 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:19:47,068 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 14 treesize of output 30 [2019-11-20 03:19:47,068 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:19:47,085 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 03:19:47,086 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 03:19:47,086 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-20 03:19:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 03:19:47,097 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:19:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 03:19:47,276 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2101420315] [2019-11-20 03:19:47,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:19:47,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-20 03:19:47,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758303979] [2019-11-20 03:19:47,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 03:19:47,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:19:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 03:19:47,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-20 03:19:47,278 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand 9 states. [2019-11-20 03:19:59,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:19:59,938 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2019-11-20 03:19:59,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 03:19:59,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-11-20 03:19:59,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:19:59,940 INFO L225 Difference]: With dead ends: 107 [2019-11-20 03:19:59,940 INFO L226 Difference]: Without dead ends: 107 [2019-11-20 03:19:59,940 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-11-20 03:19:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-20 03:19:59,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2019-11-20 03:19:59,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-20 03:19:59,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2019-11-20 03:19:59,955 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 31 [2019-11-20 03:19:59,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:19:59,956 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2019-11-20 03:19:59,956 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 03:19:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2019-11-20 03:19:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 03:19:59,957 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:19:59,957 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:20:00,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:20:00,158 INFO L410 AbstractCegarLoop]: === Iteration 7 === [sll_circular_remove_lastErr0REQUIRES_VIOLATION, sll_circular_remove_lastErr13ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr21REQUIRES_VIOLATION, sll_circular_remove_lastErr1REQUIRES_VIOLATION, sll_circular_remove_lastErr22REQUIRES_VIOLATION, sll_circular_remove_lastErr3REQUIRES_VIOLATION, sll_circular_remove_lastErr2REQUIRES_VIOLATION, sll_circular_remove_lastErr4REQUIRES_VIOLATION, sll_circular_remove_lastErr27REQUIRES_VIOLATION, sll_circular_remove_lastErr5REQUIRES_VIOLATION, sll_circular_remove_lastErr26REQUIRES_VIOLATION, sll_circular_remove_lastErr23ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr7REQUIRES_VIOLATION, sll_circular_remove_lastErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr28REQUIRES_VIOLATION, sll_circular_remove_lastErr6REQUIRES_VIOLATION, sll_circular_remove_lastErr8REQUIRES_VIOLATION, sll_circular_remove_lastErr29REQUIRES_VIOLATION, sll_circular_remove_lastErr9REQUIRES_VIOLATION, sll_circular_remove_lastErr11REQUIRES_VIOLATION, sll_circular_remove_lastErr10REQUIRES_VIOLATION, sll_circular_remove_lastErr12ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr14ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr15REQUIRES_VIOLATION, sll_circular_remove_lastErr24ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr16REQUIRES_VIOLATION, sll_circular_remove_lastErr17REQUIRES_VIOLATION, sll_circular_remove_lastErr19REQUIRES_VIOLATION, sll_circular_remove_lastErr18REQUIRES_VIOLATION, sll_circular_remove_lastErr20REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:20:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:20:00,158 INFO L82 PathProgramCache]: Analyzing trace with hash 899872781, now seen corresponding path program 1 times [2019-11-20 03:20:00,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:20:00,159 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [392766623] [2019-11-20 03:20:00,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/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 03:20:00,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:20:00,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 03:20:00,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:20:00,379 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 03:20:00,379 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:20:00,385 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:00,387 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 03:20:00,388 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 03:20:00,400 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:00,401 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:20:00,401 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 03:20:00,532 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:00,533 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 03:20:00,533 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:20:00,544 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:00,548 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 03:20:00,548 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 03:20:00,557 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:20:00,557 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 03:20:00,558 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:20 [2019-11-20 03:20:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:20:00,597 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:20:00,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 03:20:00,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 03:20:00,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:20:00,879 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:20:00,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:20:00,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:20:00,884 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:20:00,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:20:00,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:20:00,889 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:20:06,363 WARN L191 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2019-11-20 03:20:06,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:20:09,048 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2019-11-20 03:20:09,699 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:20:09,699 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [392766623] [2019-11-20 03:20:09,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:20:09,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-20 03:20:09,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089475836] [2019-11-20 03:20:09,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 03:20:09,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:20:09,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 03:20:09,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=201, Unknown=1, NotChecked=0, Total=240 [2019-11-20 03:20:09,701 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand 16 states. [2019-11-20 03:20:42,298 WARN L191 SmtUtils]: Spent 12.14 s on a formula simplification that was a NOOP. DAG size: 51 [2019-11-20 03:21:12,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:21:12,062 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2019-11-20 03:21:12,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 03:21:12,063 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2019-11-20 03:21:12,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:21:12,064 INFO L225 Difference]: With dead ends: 97 [2019-11-20 03:21:12,064 INFO L226 Difference]: Without dead ends: 97 [2019-11-20 03:21:12,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=80, Invalid=369, Unknown=13, NotChecked=0, Total=462 [2019-11-20 03:21:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-20 03:21:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2019-11-20 03:21:12,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-20 03:21:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2019-11-20 03:21:12,070 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 31 [2019-11-20 03:21:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:21:12,071 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2019-11-20 03:21:12,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 03:21:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2019-11-20 03:21:12,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-20 03:21:12,072 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:21:12,072 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:21:12,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:21:12,275 INFO L410 AbstractCegarLoop]: === Iteration 8 === [sll_circular_remove_lastErr0REQUIRES_VIOLATION, sll_circular_remove_lastErr13ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr21REQUIRES_VIOLATION, sll_circular_remove_lastErr1REQUIRES_VIOLATION, sll_circular_remove_lastErr22REQUIRES_VIOLATION, sll_circular_remove_lastErr3REQUIRES_VIOLATION, sll_circular_remove_lastErr2REQUIRES_VIOLATION, sll_circular_remove_lastErr4REQUIRES_VIOLATION, sll_circular_remove_lastErr27REQUIRES_VIOLATION, sll_circular_remove_lastErr5REQUIRES_VIOLATION, sll_circular_remove_lastErr26REQUIRES_VIOLATION, sll_circular_remove_lastErr23ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr7REQUIRES_VIOLATION, sll_circular_remove_lastErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr28REQUIRES_VIOLATION, sll_circular_remove_lastErr6REQUIRES_VIOLATION, sll_circular_remove_lastErr8REQUIRES_VIOLATION, sll_circular_remove_lastErr29REQUIRES_VIOLATION, sll_circular_remove_lastErr9REQUIRES_VIOLATION, sll_circular_remove_lastErr11REQUIRES_VIOLATION, sll_circular_remove_lastErr10REQUIRES_VIOLATION, sll_circular_remove_lastErr12ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr14ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr15REQUIRES_VIOLATION, sll_circular_remove_lastErr24ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr16REQUIRES_VIOLATION, sll_circular_remove_lastErr17REQUIRES_VIOLATION, sll_circular_remove_lastErr19REQUIRES_VIOLATION, sll_circular_remove_lastErr18REQUIRES_VIOLATION, sll_circular_remove_lastErr20REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:21:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:21:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1688996133, now seen corresponding path program 1 times [2019-11-20 03:21:12,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:21:12,276 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [304268947] [2019-11-20 03:21:12,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/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 03:21:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:21:12,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 03:21:12,491 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:21:12,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 03:21:12,542 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:21:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 03:21:12,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304268947] [2019-11-20 03:21:12,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:21:12,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 03:21:12,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920379866] [2019-11-20 03:21:12,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 03:21:12,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 03:21:12,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 03:21:12,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 03:21:12,587 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 6 states. [2019-11-20 03:21:12,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:21:12,647 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2019-11-20 03:21:12,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 03:21:12,649 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-11-20 03:21:12,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:21:12,650 INFO L225 Difference]: With dead ends: 100 [2019-11-20 03:21:12,650 INFO L226 Difference]: Without dead ends: 100 [2019-11-20 03:21:12,650 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-20 03:21:12,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-20 03:21:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2019-11-20 03:21:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-20 03:21:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2019-11-20 03:21:12,655 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 37 [2019-11-20 03:21:12,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:21:12,655 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2019-11-20 03:21:12,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 03:21:12,655 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2019-11-20 03:21:12,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 03:21:12,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:21:12,665 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:21:12,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:21:12,869 INFO L410 AbstractCegarLoop]: === Iteration 9 === [sll_circular_remove_lastErr0REQUIRES_VIOLATION, sll_circular_remove_lastErr13ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr21REQUIRES_VIOLATION, sll_circular_remove_lastErr1REQUIRES_VIOLATION, sll_circular_remove_lastErr22REQUIRES_VIOLATION, sll_circular_remove_lastErr3REQUIRES_VIOLATION, sll_circular_remove_lastErr2REQUIRES_VIOLATION, sll_circular_remove_lastErr4REQUIRES_VIOLATION, sll_circular_remove_lastErr27REQUIRES_VIOLATION, sll_circular_remove_lastErr5REQUIRES_VIOLATION, sll_circular_remove_lastErr26REQUIRES_VIOLATION, sll_circular_remove_lastErr23ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr7REQUIRES_VIOLATION, sll_circular_remove_lastErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr28REQUIRES_VIOLATION, sll_circular_remove_lastErr6REQUIRES_VIOLATION, sll_circular_remove_lastErr8REQUIRES_VIOLATION, sll_circular_remove_lastErr29REQUIRES_VIOLATION, sll_circular_remove_lastErr9REQUIRES_VIOLATION, sll_circular_remove_lastErr11REQUIRES_VIOLATION, sll_circular_remove_lastErr10REQUIRES_VIOLATION, sll_circular_remove_lastErr12ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr14ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr15REQUIRES_VIOLATION, sll_circular_remove_lastErr24ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_lastErr16REQUIRES_VIOLATION, sll_circular_remove_lastErr17REQUIRES_VIOLATION, sll_circular_remove_lastErr19REQUIRES_VIOLATION, sll_circular_remove_lastErr18REQUIRES_VIOLATION, sll_circular_remove_lastErr20REQUIRES_VIOLATION, sll_circular_createErr0REQUIRES_VIOLATION, sll_circular_createErr1REQUIRES_VIOLATION, sll_circular_createErr2REQUIRES_VIOLATION, sll_circular_createErr3REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 03:21:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:21:12,869 INFO L82 PathProgramCache]: Analyzing trace with hash -372167865, now seen corresponding path program 1 times [2019-11-20 03:21:12,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 03:21:12,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1997830567] [2019-11-20 03:21:12,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7721255b-2756-4675-b94d-1c6b39f97340/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 03:21:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:21:13,089 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 03:21:13,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:21:13,095 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 03:21:13,096 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:21:13,098 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 03:21:13,098 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 03:21:13,098 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 03:21:13,277 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 03:21:13,329 INFO L343 Elim1Store]: treesize reduction 3, result has 91.7 percent of original size [2019-11-20 03:21:13,329 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 17 treesize of output 43 [2019-11-20 03:21:13,330 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 03:21:13,350 INFO L567 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2019-11-20 03:21:13,351 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 03:21:13,351 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:18 [2019-11-20 03:21:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 03:21:13,400 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 03:21:13,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 03:21:13,913 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 03:21:13,916 INFO L168 Benchmark]: Toolchain (without parser) took 93831.32 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 218.1 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -145.0 MB). Peak memory consumption was 73.1 MB. Max. memory is 11.5 GB. [2019-11-20 03:21:13,916 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:21:13,917 INFO L168 Benchmark]: CACSL2BoogieTranslator took 590.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.3 MB). Free memory was 944.8 MB in the beginning and 1.2 GB in the end (delta: -210.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. [2019-11-20 03:21:13,917 INFO L168 Benchmark]: Boogie Preprocessor took 76.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 03:21:13,918 INFO L168 Benchmark]: RCFGBuilder took 844.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 65.4 MB). Peak memory consumption was 65.4 MB. Max. memory is 11.5 GB. [2019-11-20 03:21:13,918 INFO L168 Benchmark]: TraceAbstraction took 92314.77 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 39.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -5.2 MB). Peak memory consumption was 34.6 MB. Max. memory is 11.5 GB. [2019-11-20 03:21:13,920 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 590.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.3 MB). Free memory was 944.8 MB in the beginning and 1.2 GB in the end (delta: -210.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 76.29 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 844.85 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: 65.4 MB). Peak memory consumption was 65.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 92314.77 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 39.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -5.2 MB). Peak memory consumption was 34.6 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...