./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.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_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i -s /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/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 961cc3a58fcae29742bbb59c935dd1303821abd8 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:52:10,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 07:52:10,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 07:52:10,644 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 07:52:10,644 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 07:52:10,646 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 07:52:10,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 07:52:10,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 07:52:10,663 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 07:52:10,667 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 07:52:10,668 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 07:52:10,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 07:52:10,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 07:52:10,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 07:52:10,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 07:52:10,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 07:52:10,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 07:52:10,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 07:52:10,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 07:52:10,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 07:52:10,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 07:52:10,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 07:52:10,692 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 07:52:10,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 07:52:10,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 07:52:10,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 07:52:10,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 07:52:10,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 07:52:10,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 07:52:10,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 07:52:10,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 07:52:10,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 07:52:10,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 07:52:10,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 07:52:10,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 07:52:10,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 07:52:10,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 07:52:10,708 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 07:52:10,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 07:52:10,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 07:52:10,711 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 07:52:10,712 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 07:52:10,742 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 07:52:10,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 07:52:10,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 07:52:10,744 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 07:52:10,744 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 07:52:10,744 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 07:52:10,744 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 07:52:10,745 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 07:52:10,745 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 07:52:10,745 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 07:52:10,745 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 07:52:10,745 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 07:52:10,746 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 07:52:10,746 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 07:52:10,746 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 07:52:10,746 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 07:52:10,747 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 07:52:10,747 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 07:52:10,747 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 07:52:10,747 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 07:52:10,747 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 07:52:10,748 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 07:52:10,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 07:52:10,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 07:52:10,748 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 07:52:10,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 07:52:10,749 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 07:52:10,749 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 07:52:10,749 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 07:52:10,750 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_c8f8b045-3b22-47b4-8b1f-69605e3397a2/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 -> 961cc3a58fcae29742bbb59c935dd1303821abd8 [2019-11-20 07:52:10,972 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 07:52:10,991 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 07:52:10,995 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 07:52:10,997 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 07:52:10,998 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 07:52:10,999 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/../../sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2019-11-20 07:52:11,075 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/data/d0db4befe/1de7ec5d0a484fc187e55f6f137cae2b/FLAG7127e4c44 [2019-11-20 07:52:11,641 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 07:52:11,642 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/sv-benchmarks/c/list-simple/dll2c_prepend_equal.i [2019-11-20 07:52:11,661 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/data/d0db4befe/1de7ec5d0a484fc187e55f6f137cae2b/FLAG7127e4c44 [2019-11-20 07:52:11,912 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/data/d0db4befe/1de7ec5d0a484fc187e55f6f137cae2b [2019-11-20 07:52:11,915 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 07:52:11,917 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 07:52:11,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 07:52:11,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 07:52:11,922 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 07:52:11,924 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:52:11" (1/1) ... [2019-11-20 07:52:11,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e9bcaca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:11, skipping insertion in model container [2019-11-20 07:52:11,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:52:11" (1/1) ... [2019-11-20 07:52:11,937 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 07:52:11,996 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 07:52:12,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:52:12,434 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 07:52:12,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:52:12,564 INFO L192 MainTranslator]: Completed translation [2019-11-20 07:52:12,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:12 WrapperNode [2019-11-20 07:52:12,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 07:52:12,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 07:52:12,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 07:52:12,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 07:52:12,582 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:12" (1/1) ... [2019-11-20 07:52:12,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:12" (1/1) ... [2019-11-20 07:52:12,605 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:12" (1/1) ... [2019-11-20 07:52:12,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:12" (1/1) ... [2019-11-20 07:52:12,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:12" (1/1) ... [2019-11-20 07:52:12,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:12" (1/1) ... [2019-11-20 07:52:12,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:12" (1/1) ... [2019-11-20 07:52:12,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 07:52:12,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 07:52:12,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 07:52:12,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 07:52:12,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/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 07:52:12,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 07:52:12,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 07:52:12,739 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 07:52:12,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 07:52:12,740 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 07:52:12,740 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-20 07:52:12,740 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2019-11-20 07:52:12,741 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2019-11-20 07:52:12,741 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_prepend [2019-11-20 07:52:12,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 07:52:12,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 07:52:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 07:52:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 07:52:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 07:52:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 07:52:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 07:52:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 07:52:12,742 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 07:52:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 07:52:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 07:52:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 07:52:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 07:52:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 07:52:12,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 07:52:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 07:52:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 07:52:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 07:52:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 07:52:12,744 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 07:52:12,745 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 07:52:12,745 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 07:52:12,745 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 07:52:12,745 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 07:52:12,745 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 07:52:12,745 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 07:52:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 07:52:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 07:52:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 07:52:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 07:52:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 07:52:12,746 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 07:52:12,747 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 07:52:12,747 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 07:52:12,747 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 07:52:12,747 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 07:52:12,747 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 07:52:12,748 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 07:52:12,748 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 07:52:12,748 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 07:52:12,748 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 07:52:12,748 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 07:52:12,748 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 07:52:12,749 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 07:52:12,749 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 07:52:12,749 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 07:52:12,749 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 07:52:12,749 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 07:52:12,749 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 07:52:12,750 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 07:52:12,750 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 07:52:12,750 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 07:52:12,750 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 07:52:12,750 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 07:52:12,751 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 07:52:12,751 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 07:52:12,751 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 07:52:12,751 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 07:52:12,751 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 07:52:12,751 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 07:52:12,751 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 07:52:12,752 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 07:52:12,752 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 07:52:12,752 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 07:52:12,752 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 07:52:12,752 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 07:52:12,753 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 07:52:12,753 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 07:52:12,753 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 07:52:12,753 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 07:52:12,753 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 07:52:12,753 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 07:52:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 07:52:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 07:52:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 07:52:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 07:52:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 07:52:12,754 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 07:52:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 07:52:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 07:52:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 07:52:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 07:52:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 07:52:12,755 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 07:52:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 07:52:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 07:52:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 07:52:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 07:52:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 07:52:12,756 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 07:52:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 07:52:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 07:52:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 07:52:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 07:52:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 07:52:12,757 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 07:52:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 07:52:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 07:52:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 07:52:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 07:52:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 07:52:12,758 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 07:52:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 07:52:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 07:52:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 07:52:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 07:52:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 07:52:12,759 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 07:52:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-20 07:52:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 07:52:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 07:52:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 07:52:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2019-11-20 07:52:12,760 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2019-11-20 07:52:12,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 07:52:12,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 07:52:12,761 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_prepend [2019-11-20 07:52:12,761 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 07:52:12,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 07:52:12,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 07:52:12,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 07:52:12,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 07:52:12,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 07:52:13,369 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 07:52:14,017 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 07:52:14,017 INFO L285 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-20 07:52:14,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:52:14 BoogieIcfgContainer [2019-11-20 07:52:14,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 07:52:14,020 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 07:52:14,020 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 07:52:14,024 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 07:52:14,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:52:11" (1/3) ... [2019-11-20 07:52:14,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166d4ef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:52:14, skipping insertion in model container [2019-11-20 07:52:14,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:52:12" (2/3) ... [2019-11-20 07:52:14,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@166d4ef5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:52:14, skipping insertion in model container [2019-11-20 07:52:14,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:52:14" (3/3) ... [2019-11-20 07:52:14,041 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_equal.i [2019-11-20 07:52:14,053 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 07:52:14,066 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 59 error locations. [2019-11-20 07:52:14,088 INFO L249 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2019-11-20 07:52:14,116 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 07:52:14,117 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 07:52:14,117 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 07:52:14,117 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 07:52:14,117 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 07:52:14,117 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 07:52:14,117 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 07:52:14,118 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 07:52:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states. [2019-11-20 07:52:14,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 07:52:14,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:52:14,173 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:52:14,173 INFO L410 AbstractCegarLoop]: === Iteration 1 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:52:14,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:52:14,180 INFO L82 PathProgramCache]: Analyzing trace with hash -357346190, now seen corresponding path program 1 times [2019-11-20 07:52:14,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:52:14,195 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1623368131] [2019-11-20 07:52:14,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/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 07:52:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:52:14,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 07:52:14,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:52:14,574 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 07:52:14,574 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:52:14,584 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:52:14,584 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:52:14,584 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 07:52:14,599 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 07:52:14,599 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:52:14,619 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 07:52:14,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1623368131] [2019-11-20 07:52:14,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:52:14,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 07:52:14,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206687035] [2019-11-20 07:52:14,632 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 07:52:14,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:52:14,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 07:52:14,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 07:52:14,647 INFO L87 Difference]: Start difference. First operand 146 states. Second operand 3 states. [2019-11-20 07:52:15,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:52:15,068 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2019-11-20 07:52:15,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 07:52:15,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-20 07:52:15,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:52:15,083 INFO L225 Difference]: With dead ends: 143 [2019-11-20 07:52:15,083 INFO L226 Difference]: Without dead ends: 136 [2019-11-20 07:52:15,084 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 07:52:15,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-11-20 07:52:15,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2019-11-20 07:52:15,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-11-20 07:52:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 143 transitions. [2019-11-20 07:52:15,172 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 143 transitions. Word has length 12 [2019-11-20 07:52:15,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:52:15,173 INFO L462 AbstractCegarLoop]: Abstraction has 136 states and 143 transitions. [2019-11-20 07:52:15,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 07:52:15,174 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 143 transitions. [2019-11-20 07:52:15,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 07:52:15,175 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:52:15,175 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:52:15,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:52:15,383 INFO L410 AbstractCegarLoop]: === Iteration 2 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:52:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:52:15,383 INFO L82 PathProgramCache]: Analyzing trace with hash -357346189, now seen corresponding path program 1 times [2019-11-20 07:52:15,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:52:15,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1703103214] [2019-11-20 07:52:15,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/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 07:52:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:52:15,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 07:52:15,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:52:15,707 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 07:52:15,707 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:52:15,720 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:52:15,721 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:52:15,721 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 07:52:15,735 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 07:52:15,735 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:52:15,795 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 07:52:15,795 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1703103214] [2019-11-20 07:52:15,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:52:15,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 07:52:15,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75398703] [2019-11-20 07:52:15,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 07:52:15,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:52:15,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 07:52:15,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 07:52:15,799 INFO L87 Difference]: Start difference. First operand 136 states and 143 transitions. Second operand 4 states. [2019-11-20 07:52:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:52:16,574 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2019-11-20 07:52:16,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 07:52:16,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-20 07:52:16,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:52:16,578 INFO L225 Difference]: With dead ends: 133 [2019-11-20 07:52:16,578 INFO L226 Difference]: Without dead ends: 133 [2019-11-20 07:52:16,579 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 07:52:16,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-20 07:52:16,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2019-11-20 07:52:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-11-20 07:52:16,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 140 transitions. [2019-11-20 07:52:16,594 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 140 transitions. Word has length 12 [2019-11-20 07:52:16,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:52:16,595 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 140 transitions. [2019-11-20 07:52:16,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 07:52:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 140 transitions. [2019-11-20 07:52:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 07:52:16,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:52:16,596 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:52:16,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:52:16,799 INFO L410 AbstractCegarLoop]: === Iteration 3 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:52:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:52:16,800 INFO L82 PathProgramCache]: Analyzing trace with hash -968318626, now seen corresponding path program 1 times [2019-11-20 07:52:16,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:52:16,801 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [651061926] [2019-11-20 07:52:16,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/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 07:52:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:52:17,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 07:52:17,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:52:17,079 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 07:52:17,083 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:52:17,141 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 07:52:17,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [651061926] [2019-11-20 07:52:17,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:52:17,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-20 07:52:17,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594970225] [2019-11-20 07:52:17,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 07:52:17,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:52:17,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 07:52:17,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 07:52:17,143 INFO L87 Difference]: Start difference. First operand 133 states and 140 transitions. Second operand 8 states. [2019-11-20 07:52:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:52:17,239 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2019-11-20 07:52:17,240 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 07:52:17,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-11-20 07:52:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:52:17,242 INFO L225 Difference]: With dead ends: 144 [2019-11-20 07:52:17,242 INFO L226 Difference]: Without dead ends: 144 [2019-11-20 07:52:17,243 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 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 07:52:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-20 07:52:17,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 134. [2019-11-20 07:52:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-20 07:52:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 141 transitions. [2019-11-20 07:52:17,261 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 141 transitions. Word has length 20 [2019-11-20 07:52:17,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:52:17,262 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 141 transitions. [2019-11-20 07:52:17,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 07:52:17,262 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 141 transitions. [2019-11-20 07:52:17,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 07:52:17,263 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:52:17,264 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:52:17,467 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:52:17,467 INFO L410 AbstractCegarLoop]: === Iteration 4 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:52:17,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:52:17,468 INFO L82 PathProgramCache]: Analyzing trace with hash 82672975, now seen corresponding path program 1 times [2019-11-20 07:52:17,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:52:17,469 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [752316530] [2019-11-20 07:52:17,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/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 07:52:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:52:17,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 07:52:17,788 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:52:17,804 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 07:52:17,805 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:52:17,816 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:52:17,816 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:52:17,817 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 07:52:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:52:17,919 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:52:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:52:18,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [752316530] [2019-11-20 07:52:18,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:52:18,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 07:52:18,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221238802] [2019-11-20 07:52:18,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 07:52:18,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:52:18,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 07:52:18,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 07:52:18,293 INFO L87 Difference]: Start difference. First operand 134 states and 141 transitions. Second operand 10 states. [2019-11-20 07:52:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:52:19,937 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-20 07:52:19,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 07:52:19,938 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-20 07:52:19,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:52:19,943 INFO L225 Difference]: With dead ends: 134 [2019-11-20 07:52:19,943 INFO L226 Difference]: Without dead ends: 134 [2019-11-20 07:52:19,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 07:52:19,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-20 07:52:19,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-11-20 07:52:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-11-20 07:52:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 140 transitions. [2019-11-20 07:52:19,970 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 140 transitions. Word has length 30 [2019-11-20 07:52:19,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:52:19,970 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 140 transitions. [2019-11-20 07:52:19,970 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 07:52:19,971 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 140 transitions. [2019-11-20 07:52:19,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 07:52:19,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:52:19,972 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:52:20,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:52:20,190 INFO L410 AbstractCegarLoop]: === Iteration 5 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:52:20,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:52:20,191 INFO L82 PathProgramCache]: Analyzing trace with hash 82672974, now seen corresponding path program 1 times [2019-11-20 07:52:20,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:52:20,191 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [362191028] [2019-11-20 07:52:20,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/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 07:52:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:52:20,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 07:52:20,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:52:20,446 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 07:52:20,446 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:52:20,448 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:52:20,449 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:52:20,449 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 07:52:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:52:20,479 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:52:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:52:20,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [362191028] [2019-11-20 07:52:20,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:52:20,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 07:52:20,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578507185] [2019-11-20 07:52:20,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 07:52:20,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:52:20,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 07:52:20,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 07:52:20,560 INFO L87 Difference]: Start difference. First operand 133 states and 140 transitions. Second operand 6 states. [2019-11-20 07:52:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:52:21,147 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2019-11-20 07:52:21,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 07:52:21,149 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-20 07:52:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:52:21,151 INFO L225 Difference]: With dead ends: 133 [2019-11-20 07:52:21,151 INFO L226 Difference]: Without dead ends: 133 [2019-11-20 07:52:21,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 07:52:21,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-11-20 07:52:21,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2019-11-20 07:52:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-11-20 07:52:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 139 transitions. [2019-11-20 07:52:21,163 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 139 transitions. Word has length 30 [2019-11-20 07:52:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:52:21,164 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 139 transitions. [2019-11-20 07:52:21,164 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 07:52:21,164 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 139 transitions. [2019-11-20 07:52:21,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 07:52:21,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:52:21,166 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:52:21,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:52:21,369 INFO L410 AbstractCegarLoop]: === Iteration 6 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:52:21,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:52:21,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2139316335, now seen corresponding path program 1 times [2019-11-20 07:52:21,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:52:21,370 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1814864901] [2019-11-20 07:52:21,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/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 07:52:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:52:21,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 07:52:21,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:52:21,709 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 07:52:21,709 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:52:21,711 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:52:21,711 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:52:21,712 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 07:52:21,811 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:52:21,811 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 07:52:21,812 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:52:21,835 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 07:52:21,836 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 07:52:21,836 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-20 07:52:21,850 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 07:52:21,850 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:52:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:52:22,024 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1814864901] [2019-11-20 07:52:22,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:52:22,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-20 07:52:22,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502542139] [2019-11-20 07:52:22,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 07:52:22,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:52:22,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 07:52:22,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-20 07:52:22,026 INFO L87 Difference]: Start difference. First operand 132 states and 139 transitions. Second operand 9 states. [2019-11-20 07:52:41,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:52:41,571 INFO L93 Difference]: Finished difference Result 173 states and 186 transitions. [2019-11-20 07:52:41,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 07:52:41,572 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-11-20 07:52:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:52:41,574 INFO L225 Difference]: With dead ends: 173 [2019-11-20 07:52:41,574 INFO L226 Difference]: Without dead ends: 173 [2019-11-20 07:52:41,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 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 07:52:41,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-11-20 07:52:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 137. [2019-11-20 07:52:41,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-20 07:52:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2019-11-20 07:52:41,588 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 32 [2019-11-20 07:52:41,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:52:41,588 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2019-11-20 07:52:41,588 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 07:52:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2019-11-20 07:52:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 07:52:41,590 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:52:41,590 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:52:41,794 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:52:41,795 INFO L410 AbstractCegarLoop]: === Iteration 7 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:52:41,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:52:41,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2139316336, now seen corresponding path program 1 times [2019-11-20 07:52:41,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:52:41,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [86218875] [2019-11-20 07:52:41,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/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 07:52:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:52:42,135 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 07:52:42,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:52:42,153 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 07:52:42,154 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:52:42,161 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:52:42,165 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 07:52:42,166 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 07:52:42,173 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:52:42,174 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:52:42,174 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 07:52:42,355 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:52:42,356 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 07:52:42,357 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:52:42,375 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:52:42,381 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 14 treesize of output 16 [2019-11-20 07:52:42,382 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 07:52:42,405 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:52:42,406 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 07:52:42,406 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:20 [2019-11-20 07:52:42,482 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 07:52:42,482 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:52:42,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 07:52:42,859 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2019-11-20 07:52:42,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:52:42,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 07:52:42,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:52:42,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:52:42,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:52:42,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 07:52:42,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:52:42,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:52:48,939 WARN L191 SmtUtils]: Spent 3.40 s on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2019-11-20 07:52:48,983 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:52:53,035 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 07:52:53,036 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [86218875] [2019-11-20 07:52:53,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:52:53,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-20 07:52:53,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439511211] [2019-11-20 07:52:53,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 07:52:53,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:52:53,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 07:52:53,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=201, Unknown=1, NotChecked=0, Total=240 [2019-11-20 07:52:53,039 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand 16 states. [2019-11-20 07:52:59,338 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_node_create_#t~malloc2.base_31| (_ BitVec 32)) (v_dll_circular_create_~head~0.offset_BEFORE_CALL_2 (_ BitVec 32)) (v_dll_circular_create_~head~0.base_BEFORE_CALL_4 (_ BitVec 32))) (let ((.cse1 (bvadd v_dll_circular_create_~head~0.offset_BEFORE_CALL_2 (_ bv4 32))) (.cse0 (bvadd v_dll_circular_create_~head~0.offset_BEFORE_CALL_2 (_ bv8 32)))) (or (exists ((v_prenex_2 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_prenex_2)) (not (bvsle (bvadd v_dll_circular_create_~head~0.offset_BEFORE_CALL_2 (_ bv8 32)) (select (store |c_old(#length)| v_prenex_2 (_ bv12 32)) v_dll_circular_create_~head~0.base_BEFORE_CALL_4))))) (bvsle .cse0 (select (store |c_#length| |v_node_create_#t~malloc2.base_31| (_ bv12 32)) v_dll_circular_create_~head~0.base_BEFORE_CALL_4)) (not (bvsle (_ bv0 32) .cse1)) (not (bvsle .cse1 .cse0)) (not (= (select |c_#valid| |v_node_create_#t~malloc2.base_31|) (_ bv0 1)))))) (= (_ bv1 1) (select |c_#valid| c_node_create_~temp~0.base)) (= (_ bv0 32) c_node_create_~temp~0.offset) (exists ((|node_create_#t~malloc2.base| (_ BitVec 32))) (and (= (select |c_old(#valid)| |node_create_#t~malloc2.base|) (_ bv0 1)) (= |c_#length| (store |c_old(#length)| |node_create_#t~malloc2.base| (_ bv12 32))))) (= (bvadd (select |c_#length| c_node_create_~temp~0.base) (_ bv4294967284 32)) (_ bv0 32))) is different from false [2019-11-20 07:53:24,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:53:24,032 INFO L93 Difference]: Finished difference Result 159 states and 169 transitions. [2019-11-20 07:53:24,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 07:53:24,033 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2019-11-20 07:53:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:53:24,035 INFO L225 Difference]: With dead ends: 159 [2019-11-20 07:53:24,036 INFO L226 Difference]: Without dead ends: 159 [2019-11-20 07:53:24,036 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=82, Invalid=382, Unknown=2, NotChecked=40, Total=506 [2019-11-20 07:53:24,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-11-20 07:53:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 137. [2019-11-20 07:53:24,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-20 07:53:24,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 146 transitions. [2019-11-20 07:53:24,044 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 146 transitions. Word has length 32 [2019-11-20 07:53:24,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:53:24,044 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 146 transitions. [2019-11-20 07:53:24,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 07:53:24,044 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 146 transitions. [2019-11-20 07:53:24,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 07:53:24,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:53:24,045 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:53:24,248 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:53:24,249 INFO L410 AbstractCegarLoop]: === Iteration 8 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:53:24,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:53:24,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1406182778, now seen corresponding path program 1 times [2019-11-20 07:53:24,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:53:24,249 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [968216769] [2019-11-20 07:53:24,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/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 07:53:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:53:24,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 07:53:24,408 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:53:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:53:24,439 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:53:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:53:24,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [968216769] [2019-11-20 07:53:24,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:53:24,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-20 07:53:24,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065143054] [2019-11-20 07:53:24,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 07:53:24,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:53:24,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 07:53:24,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 07:53:24,490 INFO L87 Difference]: Start difference. First operand 137 states and 146 transitions. Second operand 6 states. [2019-11-20 07:53:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:53:24,638 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2019-11-20 07:53:24,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 07:53:24,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-11-20 07:53:24,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:53:24,644 INFO L225 Difference]: With dead ends: 138 [2019-11-20 07:53:24,644 INFO L226 Difference]: Without dead ends: 138 [2019-11-20 07:53:24,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 63 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 07:53:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-20 07:53:24,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2019-11-20 07:53:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-20 07:53:24,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2019-11-20 07:53:24,660 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 34 [2019-11-20 07:53:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:53:24,662 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2019-11-20 07:53:24,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 07:53:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2019-11-20 07:53:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 07:53:24,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:53:24,664 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:53:24,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:53:24,865 INFO L410 AbstractCegarLoop]: === Iteration 9 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:53:24,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:53:24,866 INFO L82 PathProgramCache]: Analyzing trace with hash -646773853, now seen corresponding path program 1 times [2019-11-20 07:53:24,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:53:24,866 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1175449833] [2019-11-20 07:53:24,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/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 07:53:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:53:25,162 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 07:53:25,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:53:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:53:25,210 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:53:25,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 07:53:25,262 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-11-20 07:53:25,262 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 07:53:25,276 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2019-11-20 07:53:25,277 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 07:53:25,294 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:53:25,294 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 16 treesize of output 20 [2019-11-20 07:53:25,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:53:25,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:53:25,295 INFO L496 ElimStorePlain]: Start of recursive call 4: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 07:53:25,344 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:53:25,345 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:53:25,346 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 3 xjuncts. [2019-11-20 07:53:25,346 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:43, output treesize:43 [2019-11-20 07:53:25,346 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:53:25,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:53:25,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:53:25,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:53:25,822 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:53:25,954 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:53:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:53:26,362 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1175449833] [2019-11-20 07:53:26,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:53:26,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-20 07:53:26,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226235406] [2019-11-20 07:53:26,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 07:53:26,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:53:26,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 07:53:26,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 07:53:26,364 INFO L87 Difference]: Start difference. First operand 137 states and 145 transitions. Second operand 12 states. [2019-11-20 07:53:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:53:27,115 INFO L93 Difference]: Finished difference Result 148 states and 158 transitions. [2019-11-20 07:53:27,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 07:53:27,117 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-20 07:53:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:53:27,118 INFO L225 Difference]: With dead ends: 148 [2019-11-20 07:53:27,119 INFO L226 Difference]: Without dead ends: 148 [2019-11-20 07:53:27,119 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-11-20 07:53:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2019-11-20 07:53:27,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2019-11-20 07:53:27,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-20 07:53:27,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2019-11-20 07:53:27,125 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 35 [2019-11-20 07:53:27,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:53:27,126 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2019-11-20 07:53:27,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 07:53:27,126 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2019-11-20 07:53:27,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 07:53:27,127 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:53:27,128 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:53:27,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:53:27,331 INFO L410 AbstractCegarLoop]: === Iteration 10 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:53:27,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:53:27,332 INFO L82 PathProgramCache]: Analyzing trace with hash -646773854, now seen corresponding path program 1 times [2019-11-20 07:53:27,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:53:27,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [399768793] [2019-11-20 07:53:27,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:53:27,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:53:27,559 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 07:53:27,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:53:27,579 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2019-11-20 07:53:27,579 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:53:27,580 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:53:27,580 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:53:27,580 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:5, output treesize:1 [2019-11-20 07:53:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 07:53:27,594 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:53:27,601 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:53:27,601 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 12 treesize of output 16 [2019-11-20 07:53:27,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:53:27,602 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:53:27,604 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:53:27,604 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:53:27,605 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:3 [2019-11-20 07:53:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 07:53:27,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [399768793] [2019-11-20 07:53:27,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:53:27,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-20 07:53:27,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187728958] [2019-11-20 07:53:27,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 07:53:27,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:53:27,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 07:53:27,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 07:53:27,651 INFO L87 Difference]: Start difference. First operand 140 states and 150 transitions. Second operand 4 states. [2019-11-20 07:53:27,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:53:27,903 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2019-11-20 07:53:27,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 07:53:27,904 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2019-11-20 07:53:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:53:27,905 INFO L225 Difference]: With dead ends: 141 [2019-11-20 07:53:27,905 INFO L226 Difference]: Without dead ends: 141 [2019-11-20 07:53:27,906 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 07:53:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-20 07:53:27,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-11-20 07:53:27,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-20 07:53:27,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2019-11-20 07:53:27,910 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 35 [2019-11-20 07:53:27,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:53:27,911 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2019-11-20 07:53:27,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 07:53:27,911 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2019-11-20 07:53:27,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 07:53:27,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:53:27,912 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:53:28,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:53:28,113 INFO L410 AbstractCegarLoop]: === Iteration 11 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:53:28,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:53:28,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1424847009, now seen corresponding path program 1 times [2019-11-20 07:53:28,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:53:28,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [304458735] [2019-11-20 07:53:28,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:53:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:53:28,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 07:53:28,351 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:53:28,359 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 07:53:28,359 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:53:28,361 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:53:28,361 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:53:28,361 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 07:53:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:53:28,389 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:53:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:53:28,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304458735] [2019-11-20 07:53:28,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:53:28,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-20 07:53:28,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676767976] [2019-11-20 07:53:28,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 07:53:28,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:53:28,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 07:53:28,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 07:53:28,451 INFO L87 Difference]: Start difference. First operand 140 states and 149 transitions. Second operand 7 states. [2019-11-20 07:53:29,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:53:29,046 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2019-11-20 07:53:29,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 07:53:29,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-11-20 07:53:29,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:53:29,047 INFO L225 Difference]: With dead ends: 140 [2019-11-20 07:53:29,047 INFO L226 Difference]: Without dead ends: 140 [2019-11-20 07:53:29,048 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-20 07:53:29,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-20 07:53:29,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2019-11-20 07:53:29,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-11-20 07:53:29,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 148 transitions. [2019-11-20 07:53:29,053 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 148 transitions. Word has length 36 [2019-11-20 07:53:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:53:29,053 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 148 transitions. [2019-11-20 07:53:29,054 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 07:53:29,054 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 148 transitions. [2019-11-20 07:53:29,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 07:53:29,054 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:53:29,054 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:53:29,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:53:29,255 INFO L410 AbstractCegarLoop]: === Iteration 12 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:53:29,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:53:29,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1424847010, now seen corresponding path program 1 times [2019-11-20 07:53:29,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:53:29,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [301590765] [2019-11-20 07:53:29,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:53:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:53:29,478 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 07:53:29,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:53:29,486 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 07:53:29,486 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:53:29,490 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:53:29,490 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:53:29,491 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 07:53:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:53:29,551 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:53:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:53:29,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [301590765] [2019-11-20 07:53:29,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:53:29,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 07:53:29,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699251225] [2019-11-20 07:53:29,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 07:53:29,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:53:29,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 07:53:29,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 07:53:29,954 INFO L87 Difference]: Start difference. First operand 139 states and 148 transitions. Second operand 12 states. [2019-11-20 07:53:31,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:53:31,898 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-20 07:53:31,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 07:53:31,906 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-20 07:53:31,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:53:31,907 INFO L225 Difference]: With dead ends: 139 [2019-11-20 07:53:31,907 INFO L226 Difference]: Without dead ends: 139 [2019-11-20 07:53:31,907 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-11-20 07:53:31,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-20 07:53:31,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-11-20 07:53:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-20 07:53:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 147 transitions. [2019-11-20 07:53:31,913 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 147 transitions. Word has length 36 [2019-11-20 07:53:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:53:31,913 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 147 transitions. [2019-11-20 07:53:31,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 07:53:31,914 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 147 transitions. [2019-11-20 07:53:31,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-20 07:53:31,915 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:53:31,915 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:53:32,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:53:32,116 INFO L410 AbstractCegarLoop]: === Iteration 13 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:53:32,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:53:32,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1787067596, now seen corresponding path program 1 times [2019-11-20 07:53:32,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:53:32,116 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2054534780] [2019-11-20 07:53:32,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:53:32,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:53:32,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 07:53:32,461 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:53:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 07:53:32,512 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:53:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-20 07:53:32,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2054534780] [2019-11-20 07:53:32,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 07:53:32,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-20 07:53:32,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780765976] [2019-11-20 07:53:32,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 07:53:32,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 07:53:32,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 07:53:32,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-20 07:53:32,663 INFO L87 Difference]: Start difference. First operand 138 states and 147 transitions. Second operand 10 states. [2019-11-20 07:53:32,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:53:32,734 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2019-11-20 07:53:32,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 07:53:32,735 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2019-11-20 07:53:32,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 07:53:32,736 INFO L225 Difference]: With dead ends: 126 [2019-11-20 07:53:32,736 INFO L226 Difference]: Without dead ends: 126 [2019-11-20 07:53:32,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-20 07:53:32,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-20 07:53:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2019-11-20 07:53:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-20 07:53:32,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2019-11-20 07:53:32,741 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 47 [2019-11-20 07:53:32,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 07:53:32,742 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2019-11-20 07:53:32,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 07:53:32,742 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2019-11-20 07:53:32,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-20 07:53:32,743 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 07:53:32,744 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:53:32,948 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:53:32,949 INFO L410 AbstractCegarLoop]: === Iteration 14 === [dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_prependErr9REQUIRES_VIOLATION, dll_circular_prependErr20REQUIRES_VIOLATION, dll_circular_prependErr19REQUIRES_VIOLATION, dll_circular_prependErr18REQUIRES_VIOLATION, dll_circular_prependErr8REQUIRES_VIOLATION, dll_circular_prependErr17REQUIRES_VIOLATION, dll_circular_prependErr6REQUIRES_VIOLATION, dll_circular_prependErr7REQUIRES_VIOLATION, dll_circular_prependErr5REQUIRES_VIOLATION, dll_circular_prependErr16REQUIRES_VIOLATION, dll_circular_prependErr14REQUIRES_VIOLATION, dll_circular_prependErr15REQUIRES_VIOLATION, dll_circular_prependErr4REQUIRES_VIOLATION, dll_circular_prependErr13REQUIRES_VIOLATION, dll_circular_prependErr2REQUIRES_VIOLATION, dll_circular_prependErr3REQUIRES_VIOLATION, dll_circular_prependErr1REQUIRES_VIOLATION, dll_circular_prependErr23REQUIRES_VIOLATION, dll_circular_prependErr22REQUIRES_VIOLATION, dll_circular_prependErr12REQUIRES_VIOLATION, dll_circular_prependErr10REQUIRES_VIOLATION, dll_circular_prependErr11REQUIRES_VIOLATION, dll_circular_prependErr0REQUIRES_VIOLATION, dll_circular_prependErr21REQUIRES_VIOLATION, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr5REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr4REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 07:53:32,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:53:32,949 INFO L82 PathProgramCache]: Analyzing trace with hash 7360023, now seen corresponding path program 1 times [2019-11-20 07:53:32,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 07:53:32,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [298760590] [2019-11-20 07:53:32,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c8f8b045-3b22-47b4-8b1f-69605e3397a2/bin/uautomizer/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:53:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:53:33,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 07:53:33,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:53:33,358 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 07:53:33,358 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:53:33,368 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:53:33,368 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 07:53:33,369 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 07:53:33,393 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2019-11-20 07:53:33,393 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:53:33,411 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:53:33,411 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 07:53:33,412 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2019-11-20 07:53:34,006 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:53:34,051 INFO L343 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2019-11-20 07:53:34,051 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 36 [2019-11-20 07:53:34,052 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:53:34,120 INFO L567 ElimStorePlain]: treesize reduction 4, result has 88.9 percent of original size [2019-11-20 07:53:34,121 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 07:53:34,121 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:34, output treesize:32 [2019-11-20 07:53:34,385 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 07:53:34,415 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 07:53:34,415 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 50 [2019-11-20 07:53:34,416 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 07:53:34,489 INFO L567 ElimStorePlain]: treesize reduction 28, result has 50.0 percent of original size [2019-11-20 07:53:34,489 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 07:53:34,490 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:28 [2019-11-20 07:53:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 07:53:34,544 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 07:53:59,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 07:53:59,372 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 07:53:59,376 INFO L168 Benchmark]: Toolchain (without parser) took 107459.78 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 348.1 MB). Free memory was 944.7 MB in the beginning and 1.3 GB in the end (delta: -340.8 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2019-11-20 07:53:59,376 INFO L168 Benchmark]: CDTParser took 0.85 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:53:59,380 INFO L168 Benchmark]: CACSL2BoogieTranslator took 647.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -174.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-20 07:53:59,381 INFO L168 Benchmark]: Boogie Preprocessor took 86.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:53:59,381 INFO L168 Benchmark]: RCFGBuilder took 1366.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 80.8 MB). Peak memory consumption was 80.8 MB. Max. memory is 11.5 GB. [2019-11-20 07:53:59,382 INFO L168 Benchmark]: TraceAbstraction took 105354.76 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 198.7 MB). Free memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: -247.2 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:53:59,383 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 647.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 149.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -174.5 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 86.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 1366.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 80.8 MB). Peak memory consumption was 80.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 105354.76 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 198.7 MB). Free memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: -247.2 MB). There was no memory consumed. 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...