./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_remove_all.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_72488cd9-c625-4d92-9455-4b9bc611dc8a/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i -s /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/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 082b1bde50b1883aaa9112842176e8bb0db36577 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 08:04:33,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 08:04:33,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 08:04:33,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 08:04:33,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 08:04:33,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 08:04:33,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 08:04:33,594 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 08:04:33,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 08:04:33,604 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 08:04:33,605 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 08:04:33,607 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 08:04:33,607 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 08:04:33,609 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 08:04:33,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 08:04:33,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 08:04:33,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 08:04:33,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 08:04:33,616 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 08:04:33,620 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 08:04:33,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 08:04:33,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 08:04:33,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 08:04:33,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 08:04:33,636 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 08:04:33,637 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 08:04:33,637 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 08:04:33,639 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 08:04:33,639 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 08:04:33,640 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 08:04:33,640 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 08:04:33,641 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 08:04:33,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 08:04:33,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 08:04:33,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 08:04:33,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 08:04:33,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 08:04:33,645 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 08:04:33,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 08:04:33,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 08:04:33,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 08:04:33,648 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 08:04:33,676 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 08:04:33,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 08:04:33,678 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 08:04:33,678 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 08:04:33,678 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 08:04:33,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 08:04:33,679 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 08:04:33,679 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 08:04:33,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 08:04:33,679 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 08:04:33,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 08:04:33,680 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 08:04:33,680 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 08:04:33,680 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 08:04:33,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 08:04:33,680 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 08:04:33,681 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 08:04:33,681 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 08:04:33,681 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 08:04:33,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 08:04:33,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 08:04:33,682 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 08:04:33,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 08:04:33,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 08:04:33,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 08:04:33,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 08:04:33,694 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 08:04:33,694 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 08:04:33,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 08:04:33,694 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_72488cd9-c625-4d92-9455-4b9bc611dc8a/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 -> 082b1bde50b1883aaa9112842176e8bb0db36577 [2019-11-20 08:04:33,889 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 08:04:33,907 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 08:04:33,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 08:04:33,914 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 08:04:33,916 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 08:04:33,916 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/bin/uautomizer/../../sv-benchmarks/c/list-simple/sll2c_remove_all.i [2019-11-20 08:04:33,992 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/bin/uautomizer/data/ced71f873/182062fecbbc462d93b918bae82ef7a7/FLAGb4f6f003d [2019-11-20 08:04:34,520 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 08:04:34,520 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/sv-benchmarks/c/list-simple/sll2c_remove_all.i [2019-11-20 08:04:34,531 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/bin/uautomizer/data/ced71f873/182062fecbbc462d93b918bae82ef7a7/FLAGb4f6f003d [2019-11-20 08:04:34,837 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/bin/uautomizer/data/ced71f873/182062fecbbc462d93b918bae82ef7a7 [2019-11-20 08:04:34,840 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 08:04:34,841 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 08:04:34,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 08:04:34,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 08:04:34,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 08:04:34,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:04:34" (1/1) ... [2019-11-20 08:04:34,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1ba59a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:04:34, skipping insertion in model container [2019-11-20 08:04:34,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:04:34" (1/1) ... [2019-11-20 08:04:34,857 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 08:04:34,902 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 08:04:35,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:04:35,459 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 08:04:35,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:04:35,587 INFO L192 MainTranslator]: Completed translation [2019-11-20 08:04:35,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:04:35 WrapperNode [2019-11-20 08:04:35,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 08:04:35,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 08:04:35,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 08:04:35,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 08:04:35,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:04:35" (1/1) ... [2019-11-20 08:04:35,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:04:35" (1/1) ... [2019-11-20 08:04:35,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:04:35" (1/1) ... [2019-11-20 08:04:35,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:04:35" (1/1) ... [2019-11-20 08:04:35,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:04:35" (1/1) ... [2019-11-20 08:04:35,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:04:35" (1/1) ... [2019-11-20 08:04:35,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:04:35" (1/1) ... [2019-11-20 08:04:35,693 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 08:04:35,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 08:04:35,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 08:04:35,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 08:04:35,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:04:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/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 08:04:35,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 08:04:35,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 08:04:35,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 08:04:35,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 08:04:35,751 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 08:04:35,751 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-20 08:04:35,751 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2019-11-20 08:04:35,751 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_remove_first [2019-11-20 08:04:35,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 08:04:35,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 08:04:35,752 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 08:04:35,752 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 08:04:35,752 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 08:04:35,752 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 08:04:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 08:04:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 08:04:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 08:04:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 08:04:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 08:04:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 08:04:35,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 08:04:35,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 08:04:35,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 08:04:35,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 08:04:35,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 08:04:35,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 08:04:35,754 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 08:04:35,754 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 08:04:35,755 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 08:04:35,755 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 08:04:35,755 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 08:04:35,755 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 08:04:35,755 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 08:04:35,755 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 08:04:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 08:04:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 08:04:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 08:04:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 08:04:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 08:04:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 08:04:35,756 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 08:04:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 08:04:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 08:04:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 08:04:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 08:04:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 08:04:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 08:04:35,757 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 08:04:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 08:04:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 08:04:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 08:04:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 08:04:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 08:04:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 08:04:35,758 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 08:04:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 08:04:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 08:04:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 08:04:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 08:04:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 08:04:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 08:04:35,759 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 08:04:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 08:04:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 08:04:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 08:04:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 08:04:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 08:04:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 08:04:35,760 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 08:04:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 08:04:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 08:04:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 08:04:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 08:04:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 08:04:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 08:04:35,761 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 08:04:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 08:04:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 08:04:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 08:04:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 08:04:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 08:04:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 08:04:35,762 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 08:04:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 08:04:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 08:04:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 08:04:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 08:04:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 08:04:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 08:04:35,763 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 08:04:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 08:04:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 08:04:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 08:04:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 08:04:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 08:04:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 08:04:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 08:04:35,764 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 08:04:35,765 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 08:04:35,765 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 08:04:35,765 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 08:04:35,765 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 08:04:35,765 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 08:04:35,765 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 08:04:35,765 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 08:04:35,766 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 08:04:35,766 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 08:04:35,766 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 08:04:35,766 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 08:04:35,766 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 08:04:35,766 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 08:04:35,766 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 08:04:35,767 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 08:04:35,767 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 08:04:35,767 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 08:04:35,767 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 08:04:35,767 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-20 08:04:35,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 08:04:35,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 08:04:35,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 08:04:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2019-11-20 08:04:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_remove_first [2019-11-20 08:04:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 08:04:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 08:04:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 08:04:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 08:04:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 08:04:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 08:04:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 08:04:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 08:04:36,097 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 08:04:36,538 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 08:04:36,538 INFO L285 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-20 08:04:36,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:04:36 BoogieIcfgContainer [2019-11-20 08:04:36,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 08:04:36,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 08:04:36,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 08:04:36,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 08:04:36,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:04:34" (1/3) ... [2019-11-20 08:04:36,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa90412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:04:36, skipping insertion in model container [2019-11-20 08:04:36,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:04:35" (2/3) ... [2019-11-20 08:04:36,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aa90412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:04:36, skipping insertion in model container [2019-11-20 08:04:36,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:04:36" (3/3) ... [2019-11-20 08:04:36,545 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2019-11-20 08:04:36,552 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 08:04:36,557 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 41 error locations. [2019-11-20 08:04:36,565 INFO L249 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2019-11-20 08:04:36,583 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 08:04:36,583 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 08:04:36,583 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 08:04:36,583 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 08:04:36,583 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 08:04:36,583 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 08:04:36,584 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 08:04:36,584 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 08:04:36,605 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states. [2019-11-20 08:04:36,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 08:04:36,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:04:36,616 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:04:36,617 INFO L410 AbstractCegarLoop]: === Iteration 1 === [sll_circular_remove_firstErr18REQUIRES_VIOLATION, sll_circular_remove_firstErr19REQUIRES_VIOLATION, sll_circular_remove_firstErr20REQUIRES_VIOLATION, sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr16REQUIRES_VIOLATION, sll_circular_remove_firstErr17REQUIRES_VIOLATION, sll_circular_remove_firstErr13REQUIRES_VIOLATION, sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr14REQUIRES_VIOLATION, sll_circular_remove_firstErr15REQUIRES_VIOLATION, sll_circular_remove_firstErr11REQUIRES_VIOLATION, sll_circular_remove_firstErr12REQUIRES_VIOLATION, sll_circular_remove_firstErr29REQUIRES_VIOLATION, sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr5REQUIRES_VIOLATION, sll_circular_remove_firstErr6REQUIRES_VIOLATION, sll_circular_remove_firstErr7REQUIRES_VIOLATION, sll_circular_remove_firstErr28REQUIRES_VIOLATION, sll_circular_remove_firstErr2REQUIRES_VIOLATION, sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr3REQUIRES_VIOLATION, sll_circular_remove_firstErr24REQUIRES_VIOLATION, sll_circular_remove_firstErr4REQUIRES_VIOLATION, sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr21REQUIRES_VIOLATION, sll_circular_remove_firstErr0REQUIRES_VIOLATION, sll_circular_remove_firstErr1REQUIRES_VIOLATION, sll_circular_remove_firstErr22REQUIRES_VIOLATION, sll_circular_remove_firstErr23REQUIRES_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 08:04:36,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:04:36,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1298825814, now seen corresponding path program 1 times [2019-11-20 08:04:36,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:04:36,633 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1661102205] [2019-11-20 08:04:36,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/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 08:04:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:04:36,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 08:04:36,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:04:36,914 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 08:04:36,914 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:04:36,921 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:04:36,922 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:04:36,922 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:04:36,934 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 08:04:36,935 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:04:36,952 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 08:04:36,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1661102205] [2019-11-20 08:04:36,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:04:36,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 08:04:36,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752242314] [2019-11-20 08:04:36,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 08:04:36,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:04:36,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 08:04:36,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 08:04:36,977 INFO L87 Difference]: Start difference. First operand 107 states. Second operand 3 states. [2019-11-20 08:04:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:04:37,212 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2019-11-20 08:04:37,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:04:37,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-20 08:04:37,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:04:37,224 INFO L225 Difference]: With dead ends: 105 [2019-11-20 08:04:37,225 INFO L226 Difference]: Without dead ends: 98 [2019-11-20 08:04:37,226 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 08:04:37,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-20 08:04:37,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2019-11-20 08:04:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-20 08:04:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2019-11-20 08:04:37,288 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 12 [2019-11-20 08:04:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:04:37,289 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2019-11-20 08:04:37,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 08:04:37,289 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2019-11-20 08:04:37,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 08:04:37,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:04:37,290 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:04:37,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:04:37,502 INFO L410 AbstractCegarLoop]: === Iteration 2 === [sll_circular_remove_firstErr18REQUIRES_VIOLATION, sll_circular_remove_firstErr19REQUIRES_VIOLATION, sll_circular_remove_firstErr20REQUIRES_VIOLATION, sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr16REQUIRES_VIOLATION, sll_circular_remove_firstErr17REQUIRES_VIOLATION, sll_circular_remove_firstErr13REQUIRES_VIOLATION, sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr14REQUIRES_VIOLATION, sll_circular_remove_firstErr15REQUIRES_VIOLATION, sll_circular_remove_firstErr11REQUIRES_VIOLATION, sll_circular_remove_firstErr12REQUIRES_VIOLATION, sll_circular_remove_firstErr29REQUIRES_VIOLATION, sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr5REQUIRES_VIOLATION, sll_circular_remove_firstErr6REQUIRES_VIOLATION, sll_circular_remove_firstErr7REQUIRES_VIOLATION, sll_circular_remove_firstErr28REQUIRES_VIOLATION, sll_circular_remove_firstErr2REQUIRES_VIOLATION, sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr3REQUIRES_VIOLATION, sll_circular_remove_firstErr24REQUIRES_VIOLATION, sll_circular_remove_firstErr4REQUIRES_VIOLATION, sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr21REQUIRES_VIOLATION, sll_circular_remove_firstErr0REQUIRES_VIOLATION, sll_circular_remove_firstErr1REQUIRES_VIOLATION, sll_circular_remove_firstErr22REQUIRES_VIOLATION, sll_circular_remove_firstErr23REQUIRES_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 08:04:37,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:04:37,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1298825815, now seen corresponding path program 1 times [2019-11-20 08:04:37,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:04:37,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [71868311] [2019-11-20 08:04:37,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/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 08:04:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:04:37,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 08:04:37,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:04:37,719 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 08:04:37,719 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:04:37,726 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:04:37,727 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:04:37,727 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:04:37,745 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 08:04:37,745 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:04:37,792 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 08:04:37,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [71868311] [2019-11-20 08:04:37,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:04:37,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 08:04:37,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888977351] [2019-11-20 08:04:37,795 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 08:04:37,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:04:37,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 08:04:37,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:04:37,796 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 4 states. [2019-11-20 08:04:38,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:04:38,207 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2019-11-20 08:04:38,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:04:38,209 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-20 08:04:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:04:38,210 INFO L225 Difference]: With dead ends: 96 [2019-11-20 08:04:38,210 INFO L226 Difference]: Without dead ends: 96 [2019-11-20 08:04:38,211 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 08:04:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-20 08:04:38,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-11-20 08:04:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-20 08:04:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2019-11-20 08:04:38,230 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 12 [2019-11-20 08:04:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:04:38,231 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2019-11-20 08:04:38,232 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 08:04:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2019-11-20 08:04:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 08:04:38,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:04:38,234 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 08:04:38,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:04:38,441 INFO L410 AbstractCegarLoop]: === Iteration 3 === [sll_circular_remove_firstErr18REQUIRES_VIOLATION, sll_circular_remove_firstErr19REQUIRES_VIOLATION, sll_circular_remove_firstErr20REQUIRES_VIOLATION, sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr16REQUIRES_VIOLATION, sll_circular_remove_firstErr17REQUIRES_VIOLATION, sll_circular_remove_firstErr13REQUIRES_VIOLATION, sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr14REQUIRES_VIOLATION, sll_circular_remove_firstErr15REQUIRES_VIOLATION, sll_circular_remove_firstErr11REQUIRES_VIOLATION, sll_circular_remove_firstErr12REQUIRES_VIOLATION, sll_circular_remove_firstErr29REQUIRES_VIOLATION, sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr5REQUIRES_VIOLATION, sll_circular_remove_firstErr6REQUIRES_VIOLATION, sll_circular_remove_firstErr7REQUIRES_VIOLATION, sll_circular_remove_firstErr28REQUIRES_VIOLATION, sll_circular_remove_firstErr2REQUIRES_VIOLATION, sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr3REQUIRES_VIOLATION, sll_circular_remove_firstErr24REQUIRES_VIOLATION, sll_circular_remove_firstErr4REQUIRES_VIOLATION, sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr21REQUIRES_VIOLATION, sll_circular_remove_firstErr0REQUIRES_VIOLATION, sll_circular_remove_firstErr1REQUIRES_VIOLATION, sll_circular_remove_firstErr22REQUIRES_VIOLATION, sll_circular_remove_firstErr23REQUIRES_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 08:04:38,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:04:38,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1533647586, now seen corresponding path program 1 times [2019-11-20 08:04:38,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:04:38,443 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1929502332] [2019-11-20 08:04:38,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/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 08:04:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:04:38,661 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 08:04:38,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:04:38,688 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 08:04:38,688 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:04:38,737 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 08:04:38,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1929502332] [2019-11-20 08:04:38,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:04:38,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-20 08:04:38,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966258872] [2019-11-20 08:04:38,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 08:04:38,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:04:38,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 08:04:38,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:04:38,739 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 8 states. [2019-11-20 08:04:38,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:04:38,845 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2019-11-20 08:04:38,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 08:04:38,846 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-20 08:04:38,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:04:38,848 INFO L225 Difference]: With dead ends: 103 [2019-11-20 08:04:38,848 INFO L226 Difference]: Without dead ends: 103 [2019-11-20 08:04:38,849 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 08:04:38,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-20 08:04:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 97. [2019-11-20 08:04:38,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-20 08:04:38,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-11-20 08:04:38,861 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 19 [2019-11-20 08:04:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:04:38,862 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-11-20 08:04:38,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 08:04:38,862 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-11-20 08:04:38,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 08:04:38,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:04:38,864 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 08:04:39,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:04:39,069 INFO L410 AbstractCegarLoop]: === Iteration 4 === [sll_circular_remove_firstErr18REQUIRES_VIOLATION, sll_circular_remove_firstErr19REQUIRES_VIOLATION, sll_circular_remove_firstErr20REQUIRES_VIOLATION, sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr16REQUIRES_VIOLATION, sll_circular_remove_firstErr17REQUIRES_VIOLATION, sll_circular_remove_firstErr13REQUIRES_VIOLATION, sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr14REQUIRES_VIOLATION, sll_circular_remove_firstErr15REQUIRES_VIOLATION, sll_circular_remove_firstErr11REQUIRES_VIOLATION, sll_circular_remove_firstErr12REQUIRES_VIOLATION, sll_circular_remove_firstErr29REQUIRES_VIOLATION, sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr5REQUIRES_VIOLATION, sll_circular_remove_firstErr6REQUIRES_VIOLATION, sll_circular_remove_firstErr7REQUIRES_VIOLATION, sll_circular_remove_firstErr28REQUIRES_VIOLATION, sll_circular_remove_firstErr2REQUIRES_VIOLATION, sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr3REQUIRES_VIOLATION, sll_circular_remove_firstErr24REQUIRES_VIOLATION, sll_circular_remove_firstErr4REQUIRES_VIOLATION, sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr21REQUIRES_VIOLATION, sll_circular_remove_firstErr0REQUIRES_VIOLATION, sll_circular_remove_firstErr1REQUIRES_VIOLATION, sll_circular_remove_firstErr22REQUIRES_VIOLATION, sll_circular_remove_firstErr23REQUIRES_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 08:04:39,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:04:39,069 INFO L82 PathProgramCache]: Analyzing trace with hash 163990406, now seen corresponding path program 1 times [2019-11-20 08:04:39,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:04:39,070 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1109496816] [2019-11-20 08:04:39,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/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 08:04:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:04:39,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 08:04:39,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:04:39,334 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 08:04:39,334 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:04:39,341 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:04:39,341 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:04:39,341 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:04:39,381 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 08:04:39,381 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:04:39,473 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 08:04:39,473 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1109496816] [2019-11-20 08:04:39,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:04:39,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 08:04:39,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114535389] [2019-11-20 08:04:39,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 08:04:39,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:04:39,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 08:04:39,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 08:04:39,474 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 6 states. [2019-11-20 08:04:40,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:04:40,004 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2019-11-20 08:04:40,004 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 08:04:40,004 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-11-20 08:04:40,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:04:40,007 INFO L225 Difference]: With dead ends: 97 [2019-11-20 08:04:40,008 INFO L226 Difference]: Without dead ends: 97 [2019-11-20 08:04:40,008 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 08:04:40,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-20 08:04:40,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2019-11-20 08:04:40,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-20 08:04:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2019-11-20 08:04:40,016 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 28 [2019-11-20 08:04:40,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:04:40,017 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2019-11-20 08:04:40,017 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 08:04:40,017 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2019-11-20 08:04:40,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 08:04:40,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:04:40,018 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 08:04:40,221 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:04:40,222 INFO L410 AbstractCegarLoop]: === Iteration 5 === [sll_circular_remove_firstErr18REQUIRES_VIOLATION, sll_circular_remove_firstErr19REQUIRES_VIOLATION, sll_circular_remove_firstErr20REQUIRES_VIOLATION, sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr16REQUIRES_VIOLATION, sll_circular_remove_firstErr17REQUIRES_VIOLATION, sll_circular_remove_firstErr13REQUIRES_VIOLATION, sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr14REQUIRES_VIOLATION, sll_circular_remove_firstErr15REQUIRES_VIOLATION, sll_circular_remove_firstErr11REQUIRES_VIOLATION, sll_circular_remove_firstErr12REQUIRES_VIOLATION, sll_circular_remove_firstErr29REQUIRES_VIOLATION, sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr5REQUIRES_VIOLATION, sll_circular_remove_firstErr6REQUIRES_VIOLATION, sll_circular_remove_firstErr7REQUIRES_VIOLATION, sll_circular_remove_firstErr28REQUIRES_VIOLATION, sll_circular_remove_firstErr2REQUIRES_VIOLATION, sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr3REQUIRES_VIOLATION, sll_circular_remove_firstErr24REQUIRES_VIOLATION, sll_circular_remove_firstErr4REQUIRES_VIOLATION, sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr21REQUIRES_VIOLATION, sll_circular_remove_firstErr0REQUIRES_VIOLATION, sll_circular_remove_firstErr1REQUIRES_VIOLATION, sll_circular_remove_firstErr22REQUIRES_VIOLATION, sll_circular_remove_firstErr23REQUIRES_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 08:04:40,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:04:40,222 INFO L82 PathProgramCache]: Analyzing trace with hash 163990407, now seen corresponding path program 1 times [2019-11-20 08:04:40,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:04:40,225 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1624685947] [2019-11-20 08:04:40,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/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 08:04:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:04:40,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 08:04:40,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:04:40,498 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 08:04:40,498 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:04:40,504 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:04:40,505 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:04:40,505 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:04:40,566 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 08:04:40,566 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:04:40,910 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 08:04:40,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1624685947] [2019-11-20 08:04:40,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:04:40,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 08:04:40,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500696591] [2019-11-20 08:04:40,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 08:04:40,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:04:40,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 08:04:40,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:04:40,912 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 10 states. [2019-11-20 08:04:41,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:04:41,773 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2019-11-20 08:04:41,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 08:04:41,774 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2019-11-20 08:04:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:04:41,775 INFO L225 Difference]: With dead ends: 96 [2019-11-20 08:04:41,775 INFO L226 Difference]: Without dead ends: 96 [2019-11-20 08:04:41,776 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 08:04:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-20 08:04:41,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-11-20 08:04:41,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-20 08:04:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-11-20 08:04:41,785 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 28 [2019-11-20 08:04:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:04:41,785 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-11-20 08:04:41,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 08:04:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-11-20 08:04:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 08:04:41,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:04:41,787 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 08:04:41,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:04:41,990 INFO L410 AbstractCegarLoop]: === Iteration 6 === [sll_circular_remove_firstErr18REQUIRES_VIOLATION, sll_circular_remove_firstErr19REQUIRES_VIOLATION, sll_circular_remove_firstErr20REQUIRES_VIOLATION, sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr16REQUIRES_VIOLATION, sll_circular_remove_firstErr17REQUIRES_VIOLATION, sll_circular_remove_firstErr13REQUIRES_VIOLATION, sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr14REQUIRES_VIOLATION, sll_circular_remove_firstErr15REQUIRES_VIOLATION, sll_circular_remove_firstErr11REQUIRES_VIOLATION, sll_circular_remove_firstErr12REQUIRES_VIOLATION, sll_circular_remove_firstErr29REQUIRES_VIOLATION, sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr5REQUIRES_VIOLATION, sll_circular_remove_firstErr6REQUIRES_VIOLATION, sll_circular_remove_firstErr7REQUIRES_VIOLATION, sll_circular_remove_firstErr28REQUIRES_VIOLATION, sll_circular_remove_firstErr2REQUIRES_VIOLATION, sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr3REQUIRES_VIOLATION, sll_circular_remove_firstErr24REQUIRES_VIOLATION, sll_circular_remove_firstErr4REQUIRES_VIOLATION, sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr21REQUIRES_VIOLATION, sll_circular_remove_firstErr0REQUIRES_VIOLATION, sll_circular_remove_firstErr1REQUIRES_VIOLATION, sll_circular_remove_firstErr22REQUIRES_VIOLATION, sll_circular_remove_firstErr23REQUIRES_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 08:04:41,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:04:41,990 INFO L82 PathProgramCache]: Analyzing trace with hash 2060411056, now seen corresponding path program 1 times [2019-11-20 08:04:41,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:04:41,991 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1004164750] [2019-11-20 08:04:41,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/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 08:04:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:04:42,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 08:04:42,245 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:04:42,251 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 08:04:42,251 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:04:42,253 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:04:42,254 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:04:42,254 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:04:42,346 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:04:42,346 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 08:04:42,347 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:04:42,365 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 08:04:42,365 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 08:04:42,365 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-20 08:04:42,380 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 08:04:42,381 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:04:42,549 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 08:04:42,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1004164750] [2019-11-20 08:04:42,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:04:42,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-20 08:04:42,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70863600] [2019-11-20 08:04:42,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 08:04:42,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:04:42,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 08:04:42,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-20 08:04:42,551 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 9 states. [2019-11-20 08:05:13,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:05:13,251 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2019-11-20 08:05:13,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 08:05:13,253 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2019-11-20 08:05:13,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:05:13,254 INFO L225 Difference]: With dead ends: 101 [2019-11-20 08:05:13,254 INFO L226 Difference]: Without dead ends: 101 [2019-11-20 08:05:13,255 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 08:05:13,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-11-20 08:05:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2019-11-20 08:05:13,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-20 08:05:13,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2019-11-20 08:05:13,265 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 31 [2019-11-20 08:05:13,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:05:13,265 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2019-11-20 08:05:13,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 08:05:13,266 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2019-11-20 08:05:13,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 08:05:13,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:05:13,267 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 08:05:13,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:05:13,473 INFO L410 AbstractCegarLoop]: === Iteration 7 === [sll_circular_remove_firstErr18REQUIRES_VIOLATION, sll_circular_remove_firstErr19REQUIRES_VIOLATION, sll_circular_remove_firstErr20REQUIRES_VIOLATION, sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr16REQUIRES_VIOLATION, sll_circular_remove_firstErr17REQUIRES_VIOLATION, sll_circular_remove_firstErr13REQUIRES_VIOLATION, sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr14REQUIRES_VIOLATION, sll_circular_remove_firstErr15REQUIRES_VIOLATION, sll_circular_remove_firstErr11REQUIRES_VIOLATION, sll_circular_remove_firstErr12REQUIRES_VIOLATION, sll_circular_remove_firstErr29REQUIRES_VIOLATION, sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr5REQUIRES_VIOLATION, sll_circular_remove_firstErr6REQUIRES_VIOLATION, sll_circular_remove_firstErr7REQUIRES_VIOLATION, sll_circular_remove_firstErr28REQUIRES_VIOLATION, sll_circular_remove_firstErr2REQUIRES_VIOLATION, sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr3REQUIRES_VIOLATION, sll_circular_remove_firstErr24REQUIRES_VIOLATION, sll_circular_remove_firstErr4REQUIRES_VIOLATION, sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr21REQUIRES_VIOLATION, sll_circular_remove_firstErr0REQUIRES_VIOLATION, sll_circular_remove_firstErr1REQUIRES_VIOLATION, sll_circular_remove_firstErr22REQUIRES_VIOLATION, sll_circular_remove_firstErr23REQUIRES_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 08:05:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:05:13,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2060411057, now seen corresponding path program 1 times [2019-11-20 08:05:13,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:05:13,474 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [397355790] [2019-11-20 08:05:13,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/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 08:05:13,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:05:13,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 08:05:13,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:05:13,721 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 08:05:13,721 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:05:13,728 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:05:13,730 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 08:05:13,731 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:05:13,737 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:05:13,737 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:05:13,737 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 08:05:13,867 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:05:13,867 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 08:05:13,868 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:05:13,880 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:05:13,884 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 08:05:13,884 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:05:13,892 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:05:13,893 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 08:05:13,893 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:20 [2019-11-20 08:05:13,932 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 08:05:13,932 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:05:14,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 08:05:14,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 08:05:14,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:05:14,191 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:05:14,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:05:14,196 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:05:14,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:05:14,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:05:14,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:05:14,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:05:18,946 WARN L191 SmtUtils]: Spent 2.34 s on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2019-11-20 08:05:18,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:05:21,661 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2019-11-20 08:05:22,420 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 08:05:22,420 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [397355790] [2019-11-20 08:05:22,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:05:22,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-20 08:05:22,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037175267] [2019-11-20 08:05:22,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 08:05:22,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:05:22,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 08:05:22,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=201, Unknown=1, NotChecked=0, Total=240 [2019-11-20 08:05:22,422 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 16 states. [2019-11-20 08:05:27,662 WARN L838 $PredicateComparison]: unable to prove that (and (= (_ bv1 1) (select |c_#valid| c_node_create_~temp~0.base)) (exists ((|node_create_#t~malloc2.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |node_create_#t~malloc2.base|) (_ bv0 1)) (= (store |c_old(#length)| |node_create_#t~malloc2.base| (_ bv8 32)) |c_#length|))) (= (bvadd (select |c_#length| c_node_create_~temp~0.base) (_ bv4294967288 32)) (_ bv0 32)) (forall ((v_sll_circular_create_~last~0.offset_BEFORE_CALL_2 (_ BitVec 32)) (v_sll_circular_create_~last~0.base_BEFORE_CALL_4 (_ BitVec 32)) (|v_node_create_#t~malloc2.base_31| (_ BitVec 32))) (let ((.cse0 (bvadd v_sll_circular_create_~last~0.offset_BEFORE_CALL_2 (_ bv4 32)))) (or (not (bvsle v_sll_circular_create_~last~0.offset_BEFORE_CALL_2 .cse0)) (exists ((v_prenex_2 (_ BitVec 32))) (and (not (bvsle (bvadd v_sll_circular_create_~last~0.offset_BEFORE_CALL_2 (_ bv4 32)) (select (store |c_old(#length)| v_prenex_2 (_ bv8 32)) v_sll_circular_create_~last~0.base_BEFORE_CALL_4))) (= (_ bv0 1) (select |c_old(#valid)| v_prenex_2)))) (bvsle .cse0 (select (store |c_#length| |v_node_create_#t~malloc2.base_31| (_ bv8 32)) v_sll_circular_create_~last~0.base_BEFORE_CALL_4)) (not (bvsle (_ bv0 32) v_sll_circular_create_~last~0.offset_BEFORE_CALL_2)) (not (= (select |c_#valid| |v_node_create_#t~malloc2.base_31|) (_ bv0 1)))))) (= (_ bv0 32) c_node_create_~temp~0.offset)) is different from false [2019-11-20 08:05:50,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:05:50,096 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2019-11-20 08:05:50,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 08:05:50,098 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2019-11-20 08:05:50,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:05:50,099 INFO L225 Difference]: With dead ends: 94 [2019-11-20 08:05:50,099 INFO L226 Difference]: Without dead ends: 94 [2019-11-20 08:05:50,099 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=74, Invalid=348, Unknown=2, NotChecked=38, Total=462 [2019-11-20 08:05:50,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-20 08:05:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2019-11-20 08:05:50,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-20 08:05:50,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-11-20 08:05:50,110 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 31 [2019-11-20 08:05:50,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:05:50,110 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-11-20 08:05:50,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 08:05:50,111 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-11-20 08:05:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-20 08:05:50,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:05:50,111 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 08:05:50,316 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:05:50,316 INFO L410 AbstractCegarLoop]: === Iteration 8 === [sll_circular_remove_firstErr18REQUIRES_VIOLATION, sll_circular_remove_firstErr19REQUIRES_VIOLATION, sll_circular_remove_firstErr20REQUIRES_VIOLATION, sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr16REQUIRES_VIOLATION, sll_circular_remove_firstErr17REQUIRES_VIOLATION, sll_circular_remove_firstErr13REQUIRES_VIOLATION, sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr14REQUIRES_VIOLATION, sll_circular_remove_firstErr15REQUIRES_VIOLATION, sll_circular_remove_firstErr11REQUIRES_VIOLATION, sll_circular_remove_firstErr12REQUIRES_VIOLATION, sll_circular_remove_firstErr29REQUIRES_VIOLATION, sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr5REQUIRES_VIOLATION, sll_circular_remove_firstErr6REQUIRES_VIOLATION, sll_circular_remove_firstErr7REQUIRES_VIOLATION, sll_circular_remove_firstErr28REQUIRES_VIOLATION, sll_circular_remove_firstErr2REQUIRES_VIOLATION, sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr3REQUIRES_VIOLATION, sll_circular_remove_firstErr24REQUIRES_VIOLATION, sll_circular_remove_firstErr4REQUIRES_VIOLATION, sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr21REQUIRES_VIOLATION, sll_circular_remove_firstErr0REQUIRES_VIOLATION, sll_circular_remove_firstErr1REQUIRES_VIOLATION, sll_circular_remove_firstErr22REQUIRES_VIOLATION, sll_circular_remove_firstErr23REQUIRES_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 08:05:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:05:50,317 INFO L82 PathProgramCache]: Analyzing trace with hash -290959594, now seen corresponding path program 1 times [2019-11-20 08:05:50,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:05:50,317 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1687582783] [2019-11-20 08:05:50,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/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 08:05:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:05:50,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 08:05:50,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:05:50,569 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 08:05:50,570 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:05:50,601 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 08:05:50,601 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1687582783] [2019-11-20 08:05:50,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:05:50,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 08:05:50,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204928873] [2019-11-20 08:05:50,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 08:05:50,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:05:50,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 08:05:50,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 08:05:50,602 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 6 states. [2019-11-20 08:05:50,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:05:50,653 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2019-11-20 08:05:50,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 08:05:50,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2019-11-20 08:05:50,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:05:50,657 INFO L225 Difference]: With dead ends: 97 [2019-11-20 08:05:50,657 INFO L226 Difference]: Without dead ends: 97 [2019-11-20 08:05:50,657 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 08:05:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-20 08:05:50,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2019-11-20 08:05:50,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-20 08:05:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2019-11-20 08:05:50,669 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 37 [2019-11-20 08:05:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:05:50,672 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2019-11-20 08:05:50,672 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 08:05:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2019-11-20 08:05:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 08:05:50,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:05:50,674 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 08:05:50,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:05:50,877 INFO L410 AbstractCegarLoop]: === Iteration 9 === [sll_circular_remove_firstErr18REQUIRES_VIOLATION, sll_circular_remove_firstErr19REQUIRES_VIOLATION, sll_circular_remove_firstErr20REQUIRES_VIOLATION, sll_circular_remove_firstErr27ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr16REQUIRES_VIOLATION, sll_circular_remove_firstErr17REQUIRES_VIOLATION, sll_circular_remove_firstErr13REQUIRES_VIOLATION, sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr14REQUIRES_VIOLATION, sll_circular_remove_firstErr15REQUIRES_VIOLATION, sll_circular_remove_firstErr11REQUIRES_VIOLATION, sll_circular_remove_firstErr12REQUIRES_VIOLATION, sll_circular_remove_firstErr29REQUIRES_VIOLATION, sll_circular_remove_firstErr26ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr5REQUIRES_VIOLATION, sll_circular_remove_firstErr6REQUIRES_VIOLATION, sll_circular_remove_firstErr7REQUIRES_VIOLATION, sll_circular_remove_firstErr28REQUIRES_VIOLATION, sll_circular_remove_firstErr2REQUIRES_VIOLATION, sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr3REQUIRES_VIOLATION, sll_circular_remove_firstErr24REQUIRES_VIOLATION, sll_circular_remove_firstErr4REQUIRES_VIOLATION, sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, sll_circular_remove_firstErr21REQUIRES_VIOLATION, sll_circular_remove_firstErr0REQUIRES_VIOLATION, sll_circular_remove_firstErr1REQUIRES_VIOLATION, sll_circular_remove_firstErr22REQUIRES_VIOLATION, sll_circular_remove_firstErr23REQUIRES_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 08:05:50,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:05:50,877 INFO L82 PathProgramCache]: Analyzing trace with hash -439121942, now seen corresponding path program 1 times [2019-11-20 08:05:50,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:05:50,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2074028041] [2019-11-20 08:05:50,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_72488cd9-c625-4d92-9455-4b9bc611dc8a/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 08:05:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:05:51,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-20 08:05:51,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:05:51,103 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 08:05:51,103 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:05:51,105 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:05:51,105 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:05:51,105 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:05:51,246 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 08:05:51,305 INFO L343 Elim1Store]: treesize reduction 3, result has 91.7 percent of original size [2019-11-20 08:05:51,306 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 08:05:51,306 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:05:51,327 INFO L567 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2019-11-20 08:05:51,327 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 08:05:51,327 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:18 [2019-11-20 08:05:51,375 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 08:05:51,375 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:05:51,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:05:51,869 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 08:05:51,872 INFO L168 Benchmark]: Toolchain (without parser) took 77031.17 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.7 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -109.4 MB). Peak memory consumption was 78.3 MB. Max. memory is 11.5 GB. [2019-11-20 08:05:51,873 INFO L168 Benchmark]: CDTParser took 0.71 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 08:05:51,874 INFO L168 Benchmark]: CACSL2BoogieTranslator took 746.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -181.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-20 08:05:51,875 INFO L168 Benchmark]: Boogie Preprocessor took 105.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 08:05:51,875 INFO L168 Benchmark]: RCFGBuilder took 845.30 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 65.3 MB). Peak memory consumption was 65.3 MB. Max. memory is 11.5 GB. [2019-11-20 08:05:51,876 INFO L168 Benchmark]: TraceAbstraction took 75331.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 37.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 934.7 kB). Peak memory consumption was 38.7 MB. Max. memory is 11.5 GB. [2019-11-20 08:05:51,878 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 746.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.9 MB). Free memory was 946.1 MB in the beginning and 1.1 GB in the end (delta: -181.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 105.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 845.30 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: 65.3 MB). Peak memory consumption was 65.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 75331.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 37.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 934.7 kB). Peak memory consumption was 38.7 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...