./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_remove_all.i -s /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 7fbc512cc0cc4741feb6422c538797cb2d252dab ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 00:53:46,822 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 00:53:46,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 00:53:46,835 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 00:53:46,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 00:53:46,836 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 00:53:46,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 00:53:46,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 00:53:46,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 00:53:46,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 00:53:46,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 00:53:46,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 00:53:46,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 00:53:46,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 00:53:46,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 00:53:46,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 00:53:46,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 00:53:46,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 00:53:46,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 00:53:46,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 00:53:46,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 00:53:46,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 00:53:46,879 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 00:53:46,880 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 00:53:46,883 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 00:53:46,883 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 00:53:46,884 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 00:53:46,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 00:53:46,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 00:53:46,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 00:53:46,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 00:53:46,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 00:53:46,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 00:53:46,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 00:53:46,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 00:53:46,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 00:53:46,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 00:53:46,891 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 00:53:46,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 00:53:46,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 00:53:46,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 00:53:46,895 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 00:53:46,919 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 00:53:46,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 00:53:46,931 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 00:53:46,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 00:53:46,931 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 00:53:46,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 00:53:46,932 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 00:53:46,932 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 00:53:46,932 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 00:53:46,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 00:53:46,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 00:53:46,933 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 00:53:46,933 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 00:53:46,933 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 00:53:46,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 00:53:46,934 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 00:53:46,934 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 00:53:46,934 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 00:53:46,935 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 00:53:46,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 00:53:46,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 00:53:46,936 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 00:53:46,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 00:53:46,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 00:53:46,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 00:53:46,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 00:53:46,937 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 00:53:46,937 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 00:53:46,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 00:53:46,938 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_3aaa2700-2a69-43f7-9577-761f448083ad/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 -> 7fbc512cc0cc4741feb6422c538797cb2d252dab [2019-11-20 00:53:47,120 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 00:53:47,136 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 00:53:47,138 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 00:53:47,139 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 00:53:47,139 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 00:53:47,140 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/bin/uautomizer/../../sv-benchmarks/c/list-simple/dll2c_remove_all.i [2019-11-20 00:53:47,192 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/bin/uautomizer/data/445e553e2/10d83778b1d5494c9bd1d1738816635d/FLAGc48e1e454 [2019-11-20 00:53:47,637 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 00:53:47,638 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/sv-benchmarks/c/list-simple/dll2c_remove_all.i [2019-11-20 00:53:47,654 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/bin/uautomizer/data/445e553e2/10d83778b1d5494c9bd1d1738816635d/FLAGc48e1e454 [2019-11-20 00:53:47,665 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/bin/uautomizer/data/445e553e2/10d83778b1d5494c9bd1d1738816635d [2019-11-20 00:53:47,667 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 00:53:47,668 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 00:53:47,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 00:53:47,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 00:53:47,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 00:53:47,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:53:47" (1/1) ... [2019-11-20 00:53:47,676 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60a04da4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:53:47, skipping insertion in model container [2019-11-20 00:53:47,676 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:53:47" (1/1) ... [2019-11-20 00:53:47,683 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 00:53:47,726 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 00:53:48,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:53:48,194 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 00:53:48,263 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:53:48,331 INFO L192 MainTranslator]: Completed translation [2019-11-20 00:53:48,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:53:48 WrapperNode [2019-11-20 00:53:48,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 00:53:48,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 00:53:48,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 00:53:48,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 00:53:48,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:53:48" (1/1) ... [2019-11-20 00:53:48,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:53:48" (1/1) ... [2019-11-20 00:53:48,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:53:48" (1/1) ... [2019-11-20 00:53:48,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:53:48" (1/1) ... [2019-11-20 00:53:48,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:53:48" (1/1) ... [2019-11-20 00:53:48,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:53:48" (1/1) ... [2019-11-20 00:53:48,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:53:48" (1/1) ... [2019-11-20 00:53:48,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 00:53:48,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 00:53:48,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 00:53:48,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 00:53:48,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:53:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:53:48,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 00:53:48,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 00:53:48,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 00:53:48,501 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 00:53:48,501 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 00:53:48,501 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-20 00:53:48,502 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2019-11-20 00:53:48,502 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_remove_first [2019-11-20 00:53:48,502 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 00:53:48,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 00:53:48,503 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 00:53:48,503 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 00:53:48,503 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 00:53:48,503 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 00:53:48,503 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 00:53:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 00:53:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 00:53:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 00:53:48,504 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 00:53:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 00:53:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 00:53:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 00:53:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 00:53:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 00:53:48,505 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 00:53:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 00:53:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 00:53:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 00:53:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 00:53:48,506 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 00:53:48,507 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 00:53:48,507 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 00:53:48,507 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 00:53:48,507 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 00:53:48,507 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 00:53:48,507 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 00:53:48,508 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 00:53:48,508 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 00:53:48,508 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 00:53:48,508 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 00:53:48,508 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 00:53:48,508 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 00:53:48,509 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 00:53:48,509 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 00:53:48,509 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 00:53:48,509 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 00:53:48,509 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 00:53:48,509 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 00:53:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 00:53:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 00:53:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 00:53:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 00:53:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 00:53:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 00:53:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 00:53:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 00:53:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 00:53:48,510 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 00:53:48,511 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 00:53:48,511 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 00:53:48,511 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 00:53:48,511 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 00:53:48,511 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 00:53:48,511 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 00:53:48,511 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 00:53:48,511 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 00:53:48,511 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 00:53:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 00:53:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 00:53:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 00:53:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 00:53:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 00:53:48,512 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 00:53:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 00:53:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 00:53:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 00:53:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 00:53:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 00:53:48,513 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 00:53:48,514 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 00:53:48,514 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 00:53:48,514 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 00:53:48,514 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 00:53:48,514 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 00:53:48,514 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 00:53:48,514 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 00:53:48,514 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 00:53:48,514 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 00:53:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 00:53:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 00:53:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 00:53:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 00:53:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 00:53:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 00:53:48,515 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 00:53:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 00:53:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 00:53:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 00:53:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 00:53:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 00:53:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 00:53:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 00:53:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 00:53:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 00:53:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 00:53:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 00:53:48,516 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 00:53:48,517 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 00:53:48,517 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 00:53:48,517 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 00:53:48,517 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 00:53:48,517 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 00:53:48,517 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 00:53:48,518 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 00:53:48,518 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 00:53:48,518 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 00:53:48,518 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-20 00:53:48,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 00:53:48,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 00:53:48,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 00:53:48,519 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2019-11-20 00:53:48,519 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_remove_first [2019-11-20 00:53:48,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 00:53:48,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 00:53:48,519 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 00:53:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 00:53:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 00:53:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 00:53:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 00:53:48,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 00:53:49,017 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 00:53:49,356 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 00:53:49,356 INFO L285 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-20 00:53:49,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:53:49 BoogieIcfgContainer [2019-11-20 00:53:49,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 00:53:49,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 00:53:49,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 00:53:49,362 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 00:53:49,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:53:47" (1/3) ... [2019-11-20 00:53:49,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659248af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:53:49, skipping insertion in model container [2019-11-20 00:53:49,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:53:48" (2/3) ... [2019-11-20 00:53:49,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659248af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:53:49, skipping insertion in model container [2019-11-20 00:53:49,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:53:49" (3/3) ... [2019-11-20 00:53:49,365 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all.i [2019-11-20 00:53:49,375 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 00:53:49,389 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 45 error locations. [2019-11-20 00:53:49,400 INFO L249 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2019-11-20 00:53:49,422 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 00:53:49,422 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 00:53:49,422 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 00:53:49,423 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 00:53:49,423 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 00:53:49,423 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 00:53:49,423 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 00:53:49,423 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 00:53:49,446 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states. [2019-11-20 00:53:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 00:53:49,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:53:49,456 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:53:49,457 INFO L410 AbstractCegarLoop]: === Iteration 1 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:53:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:53:49,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1125425325, now seen corresponding path program 1 times [2019-11-20 00:53:49,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:53:49,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [749512951] [2019-11-20 00:53:49,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:53:49,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:53:49,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 00:53:49,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:53:49,826 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 00:53:49,827 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:53:49,835 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:53:49,835 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:53:49,835 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 00:53:49,849 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 00:53:49,849 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:53:49,862 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 00:53:49,862 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [749512951] [2019-11-20 00:53:49,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:53:49,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 00:53:49,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715675842] [2019-11-20 00:53:49,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 00:53:49,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:53:49,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 00:53:49,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 00:53:49,889 INFO L87 Difference]: Start difference. First operand 112 states. Second operand 3 states. [2019-11-20 00:53:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:53:50,163 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2019-11-20 00:53:50,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 00:53:50,164 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-20 00:53:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:53:50,176 INFO L225 Difference]: With dead ends: 109 [2019-11-20 00:53:50,177 INFO L226 Difference]: Without dead ends: 102 [2019-11-20 00:53:50,178 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 00:53:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-20 00:53:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2019-11-20 00:53:50,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-20 00:53:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2019-11-20 00:53:50,251 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 12 [2019-11-20 00:53:50,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:53:50,252 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2019-11-20 00:53:50,252 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 00:53:50,252 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2019-11-20 00:53:50,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 00:53:50,253 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:53:50,253 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:53:50,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:53:50,465 INFO L410 AbstractCegarLoop]: === Iteration 2 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:53:50,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:53:50,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1125425324, now seen corresponding path program 1 times [2019-11-20 00:53:50,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:53:50,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [309626415] [2019-11-20 00:53:50,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:53:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:53:50,677 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 00:53:50,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:53:50,693 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 00:53:50,693 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:53:50,700 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:53:50,701 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:53:50,701 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 00:53:50,711 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 00:53:50,711 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:53:50,753 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 00:53:50,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [309626415] [2019-11-20 00:53:50,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:53:50,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 00:53:50,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904976467] [2019-11-20 00:53:50,755 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 00:53:50,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:53:50,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 00:53:50,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 00:53:50,756 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 4 states. [2019-11-20 00:53:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:53:51,188 INFO L93 Difference]: Finished difference Result 99 states and 103 transitions. [2019-11-20 00:53:51,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 00:53:51,190 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-20 00:53:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:53:51,191 INFO L225 Difference]: With dead ends: 99 [2019-11-20 00:53:51,192 INFO L226 Difference]: Without dead ends: 99 [2019-11-20 00:53:51,192 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 00:53:51,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-20 00:53:51,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-11-20 00:53:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-20 00:53:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2019-11-20 00:53:51,215 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 12 [2019-11-20 00:53:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:53:51,216 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2019-11-20 00:53:51,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 00:53:51,217 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2019-11-20 00:53:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 00:53:51,218 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:53:51,218 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 00:53:51,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:53:51,421 INFO L410 AbstractCegarLoop]: === Iteration 3 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:53:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:53:51,422 INFO L82 PathProgramCache]: Analyzing trace with hash -589028460, now seen corresponding path program 1 times [2019-11-20 00:53:51,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:53:51,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [95019470] [2019-11-20 00:53:51,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:53:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:53:51,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 00:53:51,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:53:51,690 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 00:53:51,692 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:53:51,744 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 00:53:51,745 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [95019470] [2019-11-20 00:53:51,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:53:51,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-20 00:53:51,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769689609] [2019-11-20 00:53:51,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 00:53:51,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:53:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 00:53:51,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 00:53:51,747 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 8 states. [2019-11-20 00:53:51,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:53:51,839 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2019-11-20 00:53:51,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 00:53:51,840 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-11-20 00:53:51,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:53:51,841 INFO L225 Difference]: With dead ends: 110 [2019-11-20 00:53:51,842 INFO L226 Difference]: Without dead ends: 110 [2019-11-20 00:53:51,842 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 00:53:51,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-20 00:53:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 100. [2019-11-20 00:53:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-20 00:53:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2019-11-20 00:53:51,854 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 20 [2019-11-20 00:53:51,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:53:51,854 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2019-11-20 00:53:51,854 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 00:53:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2019-11-20 00:53:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 00:53:51,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:53:51,856 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 00:53:52,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:53:52,064 INFO L410 AbstractCegarLoop]: === Iteration 4 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:53:52,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:53:52,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1921881317, now seen corresponding path program 1 times [2019-11-20 00:53:52,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:53:52,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1889296152] [2019-11-20 00:53:52,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:53:52,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:53:52,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 00:53:52,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:53:52,319 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 00:53:52,319 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:53:52,324 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:53:52,324 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:53:52,325 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 00:53:52,393 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 00:53:52,393 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:53:52,698 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 00:53:52,698 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1889296152] [2019-11-20 00:53:52,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:53:52,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 00:53:52,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918611318] [2019-11-20 00:53:52,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 00:53:52,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:53:52,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 00:53:52,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 00:53:52,700 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 10 states. [2019-11-20 00:53:53,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:53:53,746 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2019-11-20 00:53:53,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 00:53:53,747 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-20 00:53:53,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:53:53,750 INFO L225 Difference]: With dead ends: 100 [2019-11-20 00:53:53,750 INFO L226 Difference]: Without dead ends: 100 [2019-11-20 00:53:53,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 00:53:53,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-20 00:53:53,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2019-11-20 00:53:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-20 00:53:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2019-11-20 00:53:53,764 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 30 [2019-11-20 00:53:53,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:53:53,764 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2019-11-20 00:53:53,764 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 00:53:53,764 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2019-11-20 00:53:53,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 00:53:53,765 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:53:53,766 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 00:53:53,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:53:53,968 INFO L410 AbstractCegarLoop]: === Iteration 5 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:53:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:53:53,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1921881318, now seen corresponding path program 1 times [2019-11-20 00:53:53,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:53:53,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1714512859] [2019-11-20 00:53:53,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:53:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:53:54,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 00:53:54,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:53:54,236 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 00:53:54,237 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:53:54,239 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:53:54,239 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:53:54,240 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 00:53:54,271 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 00:53:54,271 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:53:54,345 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 00:53:54,345 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1714512859] [2019-11-20 00:53:54,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:53:54,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 00:53:54,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746379145] [2019-11-20 00:53:54,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 00:53:54,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:53:54,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 00:53:54,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 00:53:54,347 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand 6 states. [2019-11-20 00:53:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:53:54,831 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2019-11-20 00:53:54,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 00:53:54,832 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-20 00:53:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:53:54,833 INFO L225 Difference]: With dead ends: 99 [2019-11-20 00:53:54,833 INFO L226 Difference]: Without dead ends: 99 [2019-11-20 00:53:54,834 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 00:53:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-20 00:53:54,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2019-11-20 00:53:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-20 00:53:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2019-11-20 00:53:54,842 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 30 [2019-11-20 00:53:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:53:54,842 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2019-11-20 00:53:54,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 00:53:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2019-11-20 00:53:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 00:53:54,844 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:53:54,844 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 00:53:55,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:53:55,047 INFO L410 AbstractCegarLoop]: === Iteration 6 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:53:55,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:53:55,048 INFO L82 PathProgramCache]: Analyzing trace with hash -92009669, now seen corresponding path program 1 times [2019-11-20 00:53:55,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:53:55,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1933352287] [2019-11-20 00:53:55,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:53:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:53:55,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 00:53:55,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:53:55,305 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 00:53:55,306 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:53:55,316 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:53:55,316 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:53:55,316 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 00:53:55,409 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:53:55,409 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 00:53:55,410 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:53:55,428 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 00:53:55,429 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 00:53:55,429 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-20 00:53:55,441 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 00:53:55,441 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:53:55,596 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 00:53:55,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1933352287] [2019-11-20 00:53:55,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:53:55,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-20 00:53:55,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70953076] [2019-11-20 00:53:55,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 00:53:55,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:53:55,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 00:53:55,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-20 00:53:55,598 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand 9 states. [2019-11-20 00:54:17,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:54:17,081 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2019-11-20 00:54:17,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 00:54:17,081 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-11-20 00:54:17,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:54:17,083 INFO L225 Difference]: With dead ends: 125 [2019-11-20 00:54:17,083 INFO L226 Difference]: Without dead ends: 125 [2019-11-20 00:54:17,083 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 00:54:17,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-20 00:54:17,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 103. [2019-11-20 00:54:17,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-20 00:54:17,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2019-11-20 00:54:17,093 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 32 [2019-11-20 00:54:17,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:54:17,093 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2019-11-20 00:54:17,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 00:54:17,094 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2019-11-20 00:54:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 00:54:17,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:54:17,095 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 00:54:17,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:54:17,298 INFO L410 AbstractCegarLoop]: === Iteration 7 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:54:17,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:17,299 INFO L82 PathProgramCache]: Analyzing trace with hash -92009668, now seen corresponding path program 1 times [2019-11-20 00:54:17,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:54:17,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1717177091] [2019-11-20 00:54:17,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:54:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:17,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 00:54:17,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:17,562 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 00:54:17,562 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:54:17,568 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:54:17,572 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 00:54:17,572 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:54:17,588 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:54:17,588 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:54:17,588 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 00:54:17,735 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:54:17,736 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 00:54:17,737 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:54:17,755 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:54:17,760 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 00:54:17,760 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:54:17,772 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:54:17,773 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 00:54:17,774 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:20 [2019-11-20 00:54:17,821 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 00:54:17,822 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:54:17,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 00:54:18,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:54:18,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 00:54:18,109 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:54:18,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:54:18,116 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:54:18,120 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 00:54:18,123 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:54:18,124 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:54:22,301 WARN L191 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2019-11-20 00:54:22,328 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:54:25,792 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 00:54:25,793 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1717177091] [2019-11-20 00:54:25,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:54:25,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-20 00:54:25,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482303252] [2019-11-20 00:54:25,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 00:54:25,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:54:25,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 00:54:25,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=201, Unknown=1, NotChecked=0, Total=240 [2019-11-20 00:54:25,795 INFO L87 Difference]: Start difference. First operand 103 states and 110 transitions. Second operand 16 states. [2019-11-20 00:54:30,756 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 00:54:58,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:54:58,649 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2019-11-20 00:54:58,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 00:54:58,650 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2019-11-20 00:54:58,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:54:58,652 INFO L225 Difference]: With dead ends: 106 [2019-11-20 00:54:58,652 INFO L226 Difference]: Without dead ends: 106 [2019-11-20 00:54:58,653 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=82, Invalid=382, Unknown=2, NotChecked=40, Total=506 [2019-11-20 00:54:58,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-20 00:54:58,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2019-11-20 00:54:58,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-20 00:54:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2019-11-20 00:54:58,660 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 32 [2019-11-20 00:54:58,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:54:58,661 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2019-11-20 00:54:58,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 00:54:58,661 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2019-11-20 00:54:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 00:54:58,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:54:58,663 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 00:54:58,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:54:58,866 INFO L410 AbstractCegarLoop]: === Iteration 8 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:54:58,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:58,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1773175378, now seen corresponding path program 1 times [2019-11-20 00:54:58,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:54:58,867 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1528209082] [2019-11-20 00:54:58,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:54:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:59,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 00:54:59,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:59,058 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 00:54:59,058 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:54:59,101 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 00:54:59,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1528209082] [2019-11-20 00:54:59,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:54:59,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-20 00:54:59,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595235162] [2019-11-20 00:54:59,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 00:54:59,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:54:59,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 00:54:59,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 00:54:59,103 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand 6 states. [2019-11-20 00:54:59,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:54:59,265 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2019-11-20 00:54:59,265 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 00:54:59,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-11-20 00:54:59,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:54:59,267 INFO L225 Difference]: With dead ends: 104 [2019-11-20 00:54:59,267 INFO L226 Difference]: Without dead ends: 104 [2019-11-20 00:54:59,267 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 00:54:59,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-20 00:54:59,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2019-11-20 00:54:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2019-11-20 00:54:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2019-11-20 00:54:59,277 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 34 [2019-11-20 00:54:59,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:54:59,278 INFO L462 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2019-11-20 00:54:59,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 00:54:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2019-11-20 00:54:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 00:54:59,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:54:59,280 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 00:54:59,482 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:54:59,482 INFO L410 AbstractCegarLoop]: === Iteration 9 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:54:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:54:59,482 INFO L82 PathProgramCache]: Analyzing trace with hash -870918825, now seen corresponding path program 1 times [2019-11-20 00:54:59,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:54:59,483 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1790461039] [2019-11-20 00:54:59,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:54:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:54:59,717 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 00:54:59,719 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:54:59,808 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 00:54:59,808 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:54:59,843 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 00:54:59,864 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 00:54:59,865 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 00:54:59,879 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 00:54:59,880 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 00:54:59,892 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:54:59,892 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 00:54:59,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:54:59,893 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:54:59,894 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 00:54:59,955 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:54:59,955 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:54:59,956 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 00:54:59,956 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:43, output treesize:43 [2019-11-20 00:54:59,957 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:55:00,110 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:55:00,233 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:55:00,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:55:00,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:55:00,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:55:01,037 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 00:55:01,038 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1790461039] [2019-11-20 00:55:01,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:55:01,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-20 00:55:01,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867280647] [2019-11-20 00:55:01,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 00:55:01,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:55:01,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 00:55:01,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 00:55:01,039 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 12 states. [2019-11-20 00:55:02,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:55:02,011 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2019-11-20 00:55:02,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 00:55:02,013 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-20 00:55:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:55:02,014 INFO L225 Difference]: With dead ends: 114 [2019-11-20 00:55:02,015 INFO L226 Difference]: Without dead ends: 114 [2019-11-20 00:55:02,015 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-11-20 00:55:02,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-20 00:55:02,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2019-11-20 00:55:02,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-20 00:55:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2019-11-20 00:55:02,024 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 35 [2019-11-20 00:55:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:55:02,025 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2019-11-20 00:55:02,025 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 00:55:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2019-11-20 00:55:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 00:55:02,026 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:55:02,026 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 00:55:02,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:55:02,231 INFO L410 AbstractCegarLoop]: === Iteration 10 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:55:02,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:55:02,232 INFO L82 PathProgramCache]: Analyzing trace with hash -870918826, now seen corresponding path program 1 times [2019-11-20 00:55:02,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:55:02,232 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [713905092] [2019-11-20 00:55:02,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:55:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:55:02,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 00:55:02,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:55:02,508 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 00:55:02,508 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:55:02,511 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:55:02,511 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:55:02,511 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:5, output treesize:1 [2019-11-20 00:55:02,527 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 00:55:02,527 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:55:02,537 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:55:02,537 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 00:55:02,538 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 00:55:02,538 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:55:02,541 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:55:02,542 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:55:02,542 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:3 [2019-11-20 00:55:02,592 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 00:55:02,592 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [713905092] [2019-11-20 00:55:02,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:55:02,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-20 00:55:02,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82690512] [2019-11-20 00:55:02,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 00:55:02,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:55:02,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 00:55:02,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 00:55:02,594 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand 4 states. [2019-11-20 00:55:02,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:55:02,800 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2019-11-20 00:55:02,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 00:55:02,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2019-11-20 00:55:02,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:55:02,802 INFO L225 Difference]: With dead ends: 107 [2019-11-20 00:55:02,802 INFO L226 Difference]: Without dead ends: 107 [2019-11-20 00:55:02,802 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 00:55:02,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-20 00:55:02,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2019-11-20 00:55:02,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-20 00:55:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2019-11-20 00:55:02,807 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 35 [2019-11-20 00:55:02,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:55:02,807 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2019-11-20 00:55:02,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 00:55:02,807 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2019-11-20 00:55:02,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 00:55:02,809 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:55:02,809 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 00:55:03,012 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:55:03,013 INFO L410 AbstractCegarLoop]: === Iteration 11 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:55:03,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:55:03,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1228679827, now seen corresponding path program 1 times [2019-11-20 00:55:03,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:55:03,019 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1736716500] [2019-11-20 00:55:03,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:55:03,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:55:03,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 00:55:03,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:55:03,332 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 00:55:03,333 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:55:03,335 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:55:03,336 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:55:03,336 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 00:55:03,378 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 00:55:03,379 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:55:03,455 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 00:55:03,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1736716500] [2019-11-20 00:55:03,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:55:03,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-20 00:55:03,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211711967] [2019-11-20 00:55:03,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 00:55:03,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:55:03,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 00:55:03,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 00:55:03,457 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand 7 states. [2019-11-20 00:55:04,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:55:04,042 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2019-11-20 00:55:04,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 00:55:04,043 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-11-20 00:55:04,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:55:04,044 INFO L225 Difference]: With dead ends: 106 [2019-11-20 00:55:04,044 INFO L226 Difference]: Without dead ends: 106 [2019-11-20 00:55:04,044 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 00:55:04,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-20 00:55:04,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-11-20 00:55:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-20 00:55:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2019-11-20 00:55:04,048 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 36 [2019-11-20 00:55:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:55:04,049 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2019-11-20 00:55:04,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 00:55:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2019-11-20 00:55:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 00:55:04,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:55:04,050 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 00:55:04,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:55:04,253 INFO L410 AbstractCegarLoop]: === Iteration 12 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:55:04,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:55:04,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1228679826, now seen corresponding path program 1 times [2019-11-20 00:55:04,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:55:04,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [418389143] [2019-11-20 00:55:04,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:55:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:55:04,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 00:55:04,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:55:04,515 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 00:55:04,515 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:55:04,520 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:55:04,521 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:55:04,521 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 00:55:04,586 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 00:55:04,587 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:55:04,989 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 00:55:04,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [418389143] [2019-11-20 00:55:04,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:55:04,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 00:55:04,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643161460] [2019-11-20 00:55:04,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 00:55:04,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:55:04,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 00:55:04,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 00:55:04,990 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand 12 states. [2019-11-20 00:55:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:55:06,589 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2019-11-20 00:55:06,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 00:55:06,590 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-20 00:55:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:55:06,591 INFO L225 Difference]: With dead ends: 105 [2019-11-20 00:55:06,591 INFO L226 Difference]: Without dead ends: 105 [2019-11-20 00:55:06,591 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 00:55:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-11-20 00:55:06,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2019-11-20 00:55:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-20 00:55:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2019-11-20 00:55:06,595 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 36 [2019-11-20 00:55:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:55:06,595 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2019-11-20 00:55:06,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 00:55:06,595 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2019-11-20 00:55:06,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-20 00:55:06,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:55:06,596 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:55:06,797 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:55:06,797 INFO L410 AbstractCegarLoop]: === Iteration 13 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:55:06,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:55:06,797 INFO L82 PathProgramCache]: Analyzing trace with hash 2025007321, now seen corresponding path program 1 times [2019-11-20 00:55:06,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:55:06,797 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [472407072] [2019-11-20 00:55:06,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:55:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:55:07,040 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 00:55:07,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:55:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-20 00:55:07,057 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:55:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-20 00:55:07,089 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [472407072] [2019-11-20 00:55:07,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:55:07,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 00:55:07,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570013538] [2019-11-20 00:55:07,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 00:55:07,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:55:07,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 00:55:07,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 00:55:07,090 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand 6 states. [2019-11-20 00:55:07,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:55:07,128 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2019-11-20 00:55:07,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 00:55:07,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2019-11-20 00:55:07,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:55:07,130 INFO L225 Difference]: With dead ends: 108 [2019-11-20 00:55:07,130 INFO L226 Difference]: Without dead ends: 108 [2019-11-20 00:55:07,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-20 00:55:07,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-20 00:55:07,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-11-20 00:55:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-11-20 00:55:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2019-11-20 00:55:07,136 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 42 [2019-11-20 00:55:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:55:07,137 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2019-11-20 00:55:07,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 00:55:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2019-11-20 00:55:07,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-20 00:55:07,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:55:07,139 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:55:07,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:55:07,340 INFO L410 AbstractCegarLoop]: === Iteration 14 === [dll_circular_remove_firstErr4REQUIRES_VIOLATION, dll_circular_remove_firstErr2REQUIRES_VIOLATION, dll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr3REQUIRES_VIOLATION, dll_circular_remove_firstErr6REQUIRES_VIOLATION, dll_circular_remove_firstErr7REQUIRES_VIOLATION, dll_circular_remove_firstErr24ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr5REQUIRES_VIOLATION, dll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr26REQUIRES_VIOLATION, dll_circular_remove_firstErr27REQUIRES_VIOLATION, dll_circular_remove_firstErr20REQUIRES_VIOLATION, dll_circular_remove_firstErr18REQUIRES_VIOLATION, dll_circular_remove_firstErr19REQUIRES_VIOLATION, dll_circular_remove_firstErr1REQUIRES_VIOLATION, dll_circular_remove_firstErr22REQUIRES_VIOLATION, dll_circular_remove_firstErr21REQUIRES_VIOLATION, dll_circular_remove_firstErr0REQUIRES_VIOLATION, dll_circular_remove_firstErr14REQUIRES_VIOLATION, dll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr15REQUIRES_VIOLATION, dll_circular_remove_firstErr13REQUIRES_VIOLATION, dll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr17REQUIRES_VIOLATION, dll_circular_remove_firstErr16REQUIRES_VIOLATION, dll_circular_remove_firstErr23ASSERT_VIOLATIONMEMORY_FREE, dll_circular_remove_firstErr12REQUIRES_VIOLATION, dll_circular_remove_firstErr11REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_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 00:55:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:55:07,340 INFO L82 PathProgramCache]: Analyzing trace with hash 411988007, now seen corresponding path program 1 times [2019-11-20 00:55:07,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:55:07,340 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2072691262] [2019-11-20 00:55:07,340 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3aaa2700-2a69-43f7-9577-761f448083ad/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 00:55:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:55:07,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 00:55:07,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:55:07,627 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 00:55:07,628 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:55:07,630 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:55:07,630 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:55:07,630 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 00:55:07,794 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 00:55:07,847 INFO L343 Elim1Store]: treesize reduction 3, result has 91.7 percent of original size [2019-11-20 00:55:07,847 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 43 [2019-11-20 00:55:07,848 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:55:07,871 INFO L567 ElimStorePlain]: treesize reduction 27, result has 40.0 percent of original size [2019-11-20 00:55:07,872 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 00:55:07,872 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:18 [2019-11-20 00:55:07,929 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 00:55:07,929 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:55:08,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:55:08,521 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 00:55:08,525 INFO L168 Benchmark]: Toolchain (without parser) took 80856.82 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 317.2 MB). Free memory was 939.3 MB in the beginning and 992.9 MB in the end (delta: -53.6 MB). Peak memory consumption was 263.6 MB. Max. memory is 11.5 GB. [2019-11-20 00:55:08,525 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:55:08,525 INFO L168 Benchmark]: CACSL2BoogieTranslator took 662.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -208.6 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-20 00:55:08,526 INFO L168 Benchmark]: Boogie Preprocessor took 101.10 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:55:08,526 INFO L168 Benchmark]: RCFGBuilder took 924.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 69.8 MB). Peak memory consumption was 69.8 MB. Max. memory is 11.5 GB. [2019-11-20 00:55:08,526 INFO L168 Benchmark]: TraceAbstraction took 79165.10 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 144.7 MB). Free memory was 1.1 GB in the beginning and 992.9 MB in the end (delta: 85.2 MB). Peak memory consumption was 229.9 MB. Max. memory is 11.5 GB. [2019-11-20 00:55:08,528 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 662.99 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 172.5 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -208.6 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 101.10 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 924.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 69.8 MB). Peak memory consumption was 69.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 79165.10 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 144.7 MB). Free memory was 1.1 GB in the beginning and 992.9 MB in the end (delta: 85.2 MB). Peak memory consumption was 229.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...