./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_append_equal.i -s /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 1f3e231c5b77f9ab25b28372001f508e3e47c051 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 01:21:54,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 01:21:54,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 01:21:54,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 01:21:54,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 01:21:54,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 01:21:54,567 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 01:21:54,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 01:21:54,580 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 01:21:54,584 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 01:21:54,584 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 01:21:54,585 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 01:21:54,586 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 01:21:54,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 01:21:54,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 01:21:54,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 01:21:54,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 01:21:54,591 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 01:21:54,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 01:21:54,597 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 01:21:54,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 01:21:54,602 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 01:21:54,604 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 01:21:54,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 01:21:54,606 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 01:21:54,607 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 01:21:54,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 01:21:54,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 01:21:54,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 01:21:54,609 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 01:21:54,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 01:21:54,610 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 01:21:54,611 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 01:21:54,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 01:21:54,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 01:21:54,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 01:21:54,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 01:21:54,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 01:21:54,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 01:21:54,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 01:21:54,615 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 01:21:54,616 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 01:21:54,638 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 01:21:54,648 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 01:21:54,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 01:21:54,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 01:21:54,649 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 01:21:54,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 01:21:54,650 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 01:21:54,650 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 01:21:54,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 01:21:54,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 01:21:54,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 01:21:54,651 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 01:21:54,651 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 01:21:54,651 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 01:21:54,651 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 01:21:54,652 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 01:21:54,652 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 01:21:54,653 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 01:21:54,653 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 01:21:54,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 01:21:54,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 01:21:54,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 01:21:54,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 01:21:54,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 01:21:54,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 01:21:54,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 01:21:54,654 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 01:21:54,655 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 01:21:54,655 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 01:21:54,655 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_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 -> 1f3e231c5b77f9ab25b28372001f508e3e47c051 [2019-11-20 01:21:54,814 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 01:21:54,827 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 01:21:54,830 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 01:21:54,831 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 01:21:54,831 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 01:21:54,832 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/bin/uautomizer/../../sv-benchmarks/c/list-simple/dll2c_append_equal.i [2019-11-20 01:21:54,885 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/bin/uautomizer/data/6b46d2dd4/c282ff6f6ac84e83b6ac65b1af7bb13b/FLAG6535fe461 [2019-11-20 01:21:55,323 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 01:21:55,323 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/sv-benchmarks/c/list-simple/dll2c_append_equal.i [2019-11-20 01:21:55,336 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/bin/uautomizer/data/6b46d2dd4/c282ff6f6ac84e83b6ac65b1af7bb13b/FLAG6535fe461 [2019-11-20 01:21:55,644 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/bin/uautomizer/data/6b46d2dd4/c282ff6f6ac84e83b6ac65b1af7bb13b [2019-11-20 01:21:55,647 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 01:21:55,648 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 01:21:55,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 01:21:55,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 01:21:55,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 01:21:55,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:21:55" (1/1) ... [2019-11-20 01:21:55,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f0c4b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:55, skipping insertion in model container [2019-11-20 01:21:55,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:21:55" (1/1) ... [2019-11-20 01:21:55,661 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 01:21:55,714 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 01:21:56,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:21:56,098 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 01:21:56,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:21:56,192 INFO L192 MainTranslator]: Completed translation [2019-11-20 01:21:56,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:56 WrapperNode [2019-11-20 01:21:56,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 01:21:56,194 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 01:21:56,194 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 01:21:56,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 01:21:56,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:56" (1/1) ... [2019-11-20 01:21:56,206 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:56" (1/1) ... [2019-11-20 01:21:56,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:56" (1/1) ... [2019-11-20 01:21:56,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:56" (1/1) ... [2019-11-20 01:21:56,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:56" (1/1) ... [2019-11-20 01:21:56,245 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:56" (1/1) ... [2019-11-20 01:21:56,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:56" (1/1) ... [2019-11-20 01:21:56,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 01:21:56,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 01:21:56,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 01:21:56,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 01:21:56,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:56" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:21:56,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 01:21:56,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 01:21:56,307 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 01:21:56,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 01:21:56,308 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 01:21:56,308 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-20 01:21:56,308 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2019-11-20 01:21:56,308 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2019-11-20 01:21:56,309 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_append [2019-11-20 01:21:56,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 01:21:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 01:21:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 01:21:56,309 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 01:21:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 01:21:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 01:21:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 01:21:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 01:21:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 01:21:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 01:21:56,310 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 01:21:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 01:21:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 01:21:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 01:21:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 01:21:56,311 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 01:21:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 01:21:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 01:21:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 01:21:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 01:21:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 01:21:56,312 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 01:21:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 01:21:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 01:21:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 01:21:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 01:21:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 01:21:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 01:21:56,313 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 01:21:56,314 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 01:21:56,314 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 01:21:56,314 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 01:21:56,314 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 01:21:56,314 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 01:21:56,314 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 01:21:56,314 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 01:21:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 01:21:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 01:21:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 01:21:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 01:21:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 01:21:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 01:21:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 01:21:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 01:21:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 01:21:56,315 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 01:21:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 01:21:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 01:21:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 01:21:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 01:21:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 01:21:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 01:21:56,316 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 01:21:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 01:21:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 01:21:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 01:21:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 01:21:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 01:21:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 01:21:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 01:21:56,317 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 01:21:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 01:21:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 01:21:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 01:21:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 01:21:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 01:21:56,318 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 01:21:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 01:21:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 01:21:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 01:21:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 01:21:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 01:21:56,319 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 01:21:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 01:21:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 01:21:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 01:21:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 01:21:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 01:21:56,320 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 01:21:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 01:21:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 01:21:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 01:21:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 01:21:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 01:21:56,321 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 01:21:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 01:21:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 01:21:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 01:21:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 01:21:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 01:21:56,322 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 01:21:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 01:21:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 01:21:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 01:21:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 01:21:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 01:21:56,323 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 01:21:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 01:21:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 01:21:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 01:21:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 01:21:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 01:21:56,324 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 01:21:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 01:21:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 01:21:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 01:21:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 01:21:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 01:21:56,325 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-20 01:21:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 01:21:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 01:21:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 01:21:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2019-11-20 01:21:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2019-11-20 01:21:56,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 01:21:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 01:21:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_append [2019-11-20 01:21:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 01:21:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 01:21:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 01:21:56,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 01:21:56,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 01:21:56,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 01:21:56,798 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 01:21:57,301 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 01:21:57,301 INFO L285 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-20 01:21:57,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:21:57 BoogieIcfgContainer [2019-11-20 01:21:57,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 01:21:57,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 01:21:57,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 01:21:57,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 01:21:57,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 01:21:55" (1/3) ... [2019-11-20 01:21:57,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f930a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 01:21:57, skipping insertion in model container [2019-11-20 01:21:57,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:21:56" (2/3) ... [2019-11-20 01:21:57,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f930a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 01:21:57, skipping insertion in model container [2019-11-20 01:21:57,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:21:57" (3/3) ... [2019-11-20 01:21:57,309 INFO L109 eAbstractionObserver]: Analyzing ICFG dll2c_append_equal.i [2019-11-20 01:21:57,318 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 01:21:57,326 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 59 error locations. [2019-11-20 01:21:57,337 INFO L249 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2019-11-20 01:21:57,356 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 01:21:57,356 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 01:21:57,357 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 01:21:57,357 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 01:21:57,357 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 01:21:57,357 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 01:21:57,357 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 01:21:57,357 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 01:21:57,384 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states. [2019-11-20 01:21:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 01:21:57,394 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:21:57,395 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:21:57,395 INFO L410 AbstractCegarLoop]: === Iteration 1 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:21:57,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:57,401 INFO L82 PathProgramCache]: Analyzing trace with hash -135371475, now seen corresponding path program 1 times [2019-11-20 01:21:57,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:21:57,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1487360597] [2019-11-20 01:21:57,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:21:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:57,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 01:21:57,646 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:57,685 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 01:21:57,686 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:21:57,694 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:21:57,695 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:21:57,695 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 01:21:57,708 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 01:21:57,709 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:21:57,723 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 01:21:57,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1487360597] [2019-11-20 01:21:57,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:21:57,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 01:21:57,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426668262] [2019-11-20 01:21:57,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 01:21:57,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:21:57,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 01:21:57,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 01:21:57,745 INFO L87 Difference]: Start difference. First operand 147 states. Second operand 3 states. [2019-11-20 01:21:58,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:21:58,069 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2019-11-20 01:21:58,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 01:21:58,071 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-20 01:21:58,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:21:58,088 INFO L225 Difference]: With dead ends: 144 [2019-11-20 01:21:58,089 INFO L226 Difference]: Without dead ends: 137 [2019-11-20 01:21:58,090 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 01:21:58,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-11-20 01:21:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2019-11-20 01:21:58,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-20 01:21:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 144 transitions. [2019-11-20 01:21:58,165 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 144 transitions. Word has length 12 [2019-11-20 01:21:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:21:58,166 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 144 transitions. [2019-11-20 01:21:58,166 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 01:21:58,166 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 144 transitions. [2019-11-20 01:21:58,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 01:21:58,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:21:58,167 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:21:58,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:21:58,370 INFO L410 AbstractCegarLoop]: === Iteration 2 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:21:58,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:58,370 INFO L82 PathProgramCache]: Analyzing trace with hash -135371474, now seen corresponding path program 1 times [2019-11-20 01:21:58,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:21:58,373 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [252550180] [2019-11-20 01:21:58,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:21:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:58,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 01:21:58,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:58,586 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 01:21:58,586 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:21:58,597 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:21:58,597 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:21:58,597 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 01:21:58,607 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 01:21:58,607 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:21:58,658 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 01:21:58,658 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [252550180] [2019-11-20 01:21:58,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:21:58,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 01:21:58,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802546408] [2019-11-20 01:21:58,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 01:21:58,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:21:58,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 01:21:58,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 01:21:58,661 INFO L87 Difference]: Start difference. First operand 137 states and 144 transitions. Second operand 4 states. [2019-11-20 01:21:59,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:21:59,255 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2019-11-20 01:21:59,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 01:21:59,256 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-20 01:21:59,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:21:59,258 INFO L225 Difference]: With dead ends: 134 [2019-11-20 01:21:59,258 INFO L226 Difference]: Without dead ends: 134 [2019-11-20 01:21:59,259 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 01:21:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-20 01:21:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2019-11-20 01:21:59,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-20 01:21:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 141 transitions. [2019-11-20 01:21:59,273 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 141 transitions. Word has length 12 [2019-11-20 01:21:59,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:21:59,273 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 141 transitions. [2019-11-20 01:21:59,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 01:21:59,274 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 141 transitions. [2019-11-20 01:21:59,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 01:21:59,274 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:21:59,275 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 01:21:59,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:21:59,478 INFO L410 AbstractCegarLoop]: === Iteration 3 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:21:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:21:59,478 INFO L82 PathProgramCache]: Analyzing trace with hash -42910856, now seen corresponding path program 1 times [2019-11-20 01:21:59,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:21:59,479 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2039888560] [2019-11-20 01:21:59,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:21:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:21:59,703 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 01:21:59,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:21:59,729 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 01:21:59,729 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:21:59,785 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 01:21:59,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2039888560] [2019-11-20 01:21:59,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:21:59,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-20 01:21:59,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614040232] [2019-11-20 01:21:59,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 01:21:59,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:21:59,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 01:21:59,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 01:21:59,787 INFO L87 Difference]: Start difference. First operand 134 states and 141 transitions. Second operand 8 states. [2019-11-20 01:21:59,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:21:59,876 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2019-11-20 01:21:59,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 01:21:59,876 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-11-20 01:21:59,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:21:59,878 INFO L225 Difference]: With dead ends: 145 [2019-11-20 01:21:59,878 INFO L226 Difference]: Without dead ends: 145 [2019-11-20 01:21:59,878 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 01:21:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-11-20 01:21:59,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 135. [2019-11-20 01:21:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-11-20 01:21:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 142 transitions. [2019-11-20 01:21:59,896 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 142 transitions. Word has length 20 [2019-11-20 01:21:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:21:59,897 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 142 transitions. [2019-11-20 01:21:59,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 01:21:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 142 transitions. [2019-11-20 01:21:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 01:21:59,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:21:59,898 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 01:22:00,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:22:00,101 INFO L410 AbstractCegarLoop]: === Iteration 4 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:22:00,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:22:00,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1313049237, now seen corresponding path program 1 times [2019-11-20 01:22:00,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:22:00,102 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [499219897] [2019-11-20 01:22:00,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:22:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:22:00,324 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 01:22:00,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:22:00,333 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 01:22:00,334 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:22:00,340 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:22:00,340 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:22:00,340 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 01:22:00,389 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 01:22:00,390 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:22:00,662 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 01:22:00,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [499219897] [2019-11-20 01:22:00,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:22:00,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 01:22:00,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396434034] [2019-11-20 01:22:00,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 01:22:00,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:22:00,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 01:22:00,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 01:22:00,664 INFO L87 Difference]: Start difference. First operand 135 states and 142 transitions. Second operand 10 states. [2019-11-20 01:22:01,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:22:01,935 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2019-11-20 01:22:01,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 01:22:01,936 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2019-11-20 01:22:01,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:22:01,939 INFO L225 Difference]: With dead ends: 135 [2019-11-20 01:22:01,939 INFO L226 Difference]: Without dead ends: 135 [2019-11-20 01:22:01,940 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 01:22:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-11-20 01:22:01,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2019-11-20 01:22:01,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-11-20 01:22:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 141 transitions. [2019-11-20 01:22:01,949 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 141 transitions. Word has length 30 [2019-11-20 01:22:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:22:01,949 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 141 transitions. [2019-11-20 01:22:01,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 01:22:01,949 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 141 transitions. [2019-11-20 01:22:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 01:22:01,950 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:22:01,950 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 01:22:02,162 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:22:02,163 INFO L410 AbstractCegarLoop]: === Iteration 5 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:22:02,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:22:02,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1313049238, now seen corresponding path program 1 times [2019-11-20 01:22:02,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:22:02,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1247855135] [2019-11-20 01:22:02,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:22:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:22:02,395 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 01:22:02,397 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:22:02,408 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 01:22:02,408 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:22:02,410 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:22:02,411 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:22:02,411 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 01:22:02,444 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 01:22:02,444 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:22:02,521 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 01:22:02,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1247855135] [2019-11-20 01:22:02,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:22:02,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 01:22:02,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735461398] [2019-11-20 01:22:02,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 01:22:02,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:22:02,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 01:22:02,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 01:22:02,523 INFO L87 Difference]: Start difference. First operand 134 states and 141 transitions. Second operand 6 states. [2019-11-20 01:22:03,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:22:03,026 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-20 01:22:03,030 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 01:22:03,030 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2019-11-20 01:22:03,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:22:03,031 INFO L225 Difference]: With dead ends: 134 [2019-11-20 01:22:03,031 INFO L226 Difference]: Without dead ends: 134 [2019-11-20 01:22:03,032 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 01:22:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-11-20 01:22:03,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-11-20 01:22:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-11-20 01:22:03,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 140 transitions. [2019-11-20 01:22:03,039 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 140 transitions. Word has length 30 [2019-11-20 01:22:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:22:03,039 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 140 transitions. [2019-11-20 01:22:03,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 01:22:03,040 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 140 transitions. [2019-11-20 01:22:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 01:22:03,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:22:03,041 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 01:22:03,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:22:03,244 INFO L410 AbstractCegarLoop]: === Iteration 6 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:22:03,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:22:03,244 INFO L82 PathProgramCache]: Analyzing trace with hash 880066955, now seen corresponding path program 1 times [2019-11-20 01:22:03,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:22:03,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [571482043] [2019-11-20 01:22:03,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:22:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:22:03,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 01:22:03,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:22:03,460 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 01:22:03,460 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:22:03,462 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:22:03,462 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:22:03,463 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 01:22:03,546 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:22:03,546 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 01:22:03,547 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:22:03,566 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 01:22:03,567 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 01:22:03,567 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-20 01:22:03,577 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 01:22:03,577 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:22:03,787 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 01:22:03,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [571482043] [2019-11-20 01:22:03,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:22:03,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-20 01:22:03,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307264236] [2019-11-20 01:22:03,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 01:22:03,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:22:03,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 01:22:03,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-20 01:22:03,789 INFO L87 Difference]: Start difference. First operand 133 states and 140 transitions. Second operand 9 states. [2019-11-20 01:22:22,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:22:22,906 INFO L93 Difference]: Finished difference Result 174 states and 187 transitions. [2019-11-20 01:22:22,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 01:22:22,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2019-11-20 01:22:22,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:22:22,908 INFO L225 Difference]: With dead ends: 174 [2019-11-20 01:22:22,908 INFO L226 Difference]: Without dead ends: 174 [2019-11-20 01:22:22,908 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 01:22:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-11-20 01:22:22,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 138. [2019-11-20 01:22:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-20 01:22:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2019-11-20 01:22:22,921 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 32 [2019-11-20 01:22:22,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:22:22,922 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2019-11-20 01:22:22,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 01:22:22,922 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2019-11-20 01:22:22,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 01:22:22,923 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:22:22,923 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 01:22:23,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:22:23,128 INFO L410 AbstractCegarLoop]: === Iteration 7 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:22:23,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:22:23,129 INFO L82 PathProgramCache]: Analyzing trace with hash 880066956, now seen corresponding path program 1 times [2019-11-20 01:22:23,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:22:23,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [898546691] [2019-11-20 01:22:23,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:22:23,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:22:23,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 01:22:23,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:22:23,374 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 01:22:23,374 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:22:23,380 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:22:23,382 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 01:22:23,383 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 01:22:23,388 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:22:23,388 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:22:23,388 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 01:22:23,549 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:22:23,550 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 01:22:23,550 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:22:23,568 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:22:23,573 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 01:22:23,574 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 01:22:23,588 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:22:23,588 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 01:22:23,589 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:20 [2019-11-20 01:22:23,631 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 01:22:23,634 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:22:23,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 01:22:23,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:22:23,879 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 01:22:23,879 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:22:23,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:22:23,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:22:23,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 01:22:23,885 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:22:23,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:22:27,401 WARN L191 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2019-11-20 01:22:27,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:22:30,130 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2019-11-20 01:22:30,733 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 01:22:30,733 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [898546691] [2019-11-20 01:22:30,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:22:30,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-20 01:22:30,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518088577] [2019-11-20 01:22:30,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 01:22:30,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:22:30,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 01:22:30,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-11-20 01:22:30,735 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand 16 states. [2019-11-20 01:22:35,326 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 01:23:10,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:23:10,889 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2019-11-20 01:23:10,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 01:23:10,891 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2019-11-20 01:23:10,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:23:10,892 INFO L225 Difference]: With dead ends: 160 [2019-11-20 01:23:10,892 INFO L226 Difference]: Without dead ends: 160 [2019-11-20 01:23:10,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=82, Invalid=383, Unknown=1, NotChecked=40, Total=506 [2019-11-20 01:23:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-20 01:23:10,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 138. [2019-11-20 01:23:10,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-20 01:23:10,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 147 transitions. [2019-11-20 01:23:10,900 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 147 transitions. Word has length 32 [2019-11-20 01:23:10,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:23:10,900 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 147 transitions. [2019-11-20 01:23:10,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 01:23:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 147 transitions. [2019-11-20 01:23:10,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 01:23:10,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:23:10,901 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 01:23:11,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:23:11,109 INFO L410 AbstractCegarLoop]: === Iteration 8 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:23:11,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:23:11,109 INFO L82 PathProgramCache]: Analyzing trace with hash -364059486, now seen corresponding path program 1 times [2019-11-20 01:23:11,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:23:11,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1242005888] [2019-11-20 01:23:11,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:23:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:23:11,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 01:23:11,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:23:11,283 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 01:23:11,283 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:23:11,340 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 01:23:11,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1242005888] [2019-11-20 01:23:11,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:23:11,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-20 01:23:11,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560416479] [2019-11-20 01:23:11,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 01:23:11,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:23:11,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 01:23:11,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 01:23:11,341 INFO L87 Difference]: Start difference. First operand 138 states and 147 transitions. Second operand 6 states. [2019-11-20 01:23:11,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:23:11,483 INFO L93 Difference]: Finished difference Result 139 states and 147 transitions. [2019-11-20 01:23:11,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 01:23:11,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2019-11-20 01:23:11,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:23:11,489 INFO L225 Difference]: With dead ends: 139 [2019-11-20 01:23:11,489 INFO L226 Difference]: Without dead ends: 139 [2019-11-20 01:23:11,489 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 01:23:11,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-20 01:23:11,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2019-11-20 01:23:11,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2019-11-20 01:23:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2019-11-20 01:23:11,495 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 34 [2019-11-20 01:23:11,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:23:11,495 INFO L462 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2019-11-20 01:23:11,495 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 01:23:11,495 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2019-11-20 01:23:11,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 01:23:11,496 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:23:11,496 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 01:23:11,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:23:11,697 INFO L410 AbstractCegarLoop]: === Iteration 9 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:23:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:23:11,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1594277127, now seen corresponding path program 1 times [2019-11-20 01:23:11,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:23:11,698 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [348661209] [2019-11-20 01:23:11,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:23:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:23:11,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 01:23:11,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:23:11,992 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 01:23:11,992 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:23:12,024 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 01:23:12,045 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 01:23:12,046 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 01:23:12,059 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 01:23:12,059 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 01:23:12,072 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:23:12,073 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 01:23:12,073 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:23:12,074 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:23:12,075 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 01:23:12,125 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:23:12,125 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:23:12,126 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 01:23:12,126 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:43, output treesize:43 [2019-11-20 01:23:12,126 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:23:12,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:23:12,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:23:12,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:23:12,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:23:12,664 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:23:13,101 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 01:23:13,102 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [348661209] [2019-11-20 01:23:13,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:23:13,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2019-11-20 01:23:13,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300095118] [2019-11-20 01:23:13,102 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 01:23:13,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:23:13,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 01:23:13,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 01:23:13,103 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand 12 states. [2019-11-20 01:23:14,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:23:14,088 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2019-11-20 01:23:14,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 01:23:14,089 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2019-11-20 01:23:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:23:14,090 INFO L225 Difference]: With dead ends: 149 [2019-11-20 01:23:14,090 INFO L226 Difference]: Without dead ends: 149 [2019-11-20 01:23:14,090 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-11-20 01:23:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-11-20 01:23:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2019-11-20 01:23:14,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-11-20 01:23:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2019-11-20 01:23:14,095 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 35 [2019-11-20 01:23:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:23:14,095 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2019-11-20 01:23:14,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 01:23:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2019-11-20 01:23:14,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 01:23:14,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:23:14,097 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 01:23:14,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:23:14,300 INFO L410 AbstractCegarLoop]: === Iteration 10 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:23:14,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:23:14,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1594277126, now seen corresponding path program 1 times [2019-11-20 01:23:14,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:23:14,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [328111785] [2019-11-20 01:23:14,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:23:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:23:14,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 01:23:14,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:23:14,538 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 01:23:14,538 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:23:14,539 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:23:14,539 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:23:14,539 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:5, output treesize:1 [2019-11-20 01:23:14,552 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 01:23:14,552 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:23:14,559 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:23:14,559 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 01:23:14,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:23:14,560 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:23:14,562 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:23:14,562 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:23:14,563 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:3 [2019-11-20 01:23:14,597 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 01:23:14,598 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [328111785] [2019-11-20 01:23:14,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:23:14,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-20 01:23:14,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591379814] [2019-11-20 01:23:14,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 01:23:14,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:23:14,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 01:23:14,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 01:23:14,599 INFO L87 Difference]: Start difference. First operand 141 states and 151 transitions. Second operand 4 states. [2019-11-20 01:23:14,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:23:14,809 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2019-11-20 01:23:14,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 01:23:14,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2019-11-20 01:23:14,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:23:14,811 INFO L225 Difference]: With dead ends: 142 [2019-11-20 01:23:14,811 INFO L226 Difference]: Without dead ends: 142 [2019-11-20 01:23:14,812 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 01:23:14,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2019-11-20 01:23:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2019-11-20 01:23:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-11-20 01:23:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 150 transitions. [2019-11-20 01:23:14,816 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 150 transitions. Word has length 35 [2019-11-20 01:23:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:23:14,816 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 150 transitions. [2019-11-20 01:23:14,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 01:23:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 150 transitions. [2019-11-20 01:23:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 01:23:14,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:23:14,817 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 01:23:15,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:23:15,021 INFO L410 AbstractCegarLoop]: === Iteration 11 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:23:15,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:23:15,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2117016643, now seen corresponding path program 1 times [2019-11-20 01:23:15,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:23:15,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1701548065] [2019-11-20 01:23:15,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:23:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:23:15,246 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 01:23:15,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:23:15,252 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 01:23:15,252 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:23:15,260 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:23:15,261 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:23:15,261 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 01:23:15,296 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 01:23:15,297 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:23:15,341 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 01:23:15,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1701548065] [2019-11-20 01:23:15,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:23:15,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2019-11-20 01:23:15,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771322818] [2019-11-20 01:23:15,342 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 01:23:15,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:23:15,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 01:23:15,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-20 01:23:15,342 INFO L87 Difference]: Start difference. First operand 141 states and 150 transitions. Second operand 7 states. [2019-11-20 01:23:15,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:23:15,881 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2019-11-20 01:23:15,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 01:23:15,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2019-11-20 01:23:15,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:23:15,883 INFO L225 Difference]: With dead ends: 141 [2019-11-20 01:23:15,883 INFO L226 Difference]: Without dead ends: 141 [2019-11-20 01:23:15,883 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 01:23:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-20 01:23:15,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2019-11-20 01:23:15,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-20 01:23:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2019-11-20 01:23:15,887 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 36 [2019-11-20 01:23:15,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:23:15,888 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2019-11-20 01:23:15,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 01:23:15,888 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2019-11-20 01:23:15,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-20 01:23:15,888 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:23:15,888 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 01:23:16,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:23:16,089 INFO L410 AbstractCegarLoop]: === Iteration 12 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:23:16,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:23:16,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2117016642, now seen corresponding path program 1 times [2019-11-20 01:23:16,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:23:16,090 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1820261715] [2019-11-20 01:23:16,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:23:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:23:16,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 01:23:16,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:23:16,314 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 01:23:16,314 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:23:16,318 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:23:16,319 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:23:16,319 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 01:23:16,365 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 01:23:16,365 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:23:16,684 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 01:23:16,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1820261715] [2019-11-20 01:23:16,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:23:16,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 01:23:16,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453127511] [2019-11-20 01:23:16,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 01:23:16,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:23:16,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 01:23:16,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 01:23:16,686 INFO L87 Difference]: Start difference. First operand 140 states and 149 transitions. Second operand 12 states. [2019-11-20 01:23:18,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:23:18,292 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2019-11-20 01:23:18,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 01:23:18,294 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2019-11-20 01:23:18,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:23:18,295 INFO L225 Difference]: With dead ends: 140 [2019-11-20 01:23:18,295 INFO L226 Difference]: Without dead ends: 140 [2019-11-20 01:23:18,295 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-11-20 01:23:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2019-11-20 01:23:18,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2019-11-20 01:23:18,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-11-20 01:23:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 148 transitions. [2019-11-20 01:23:18,300 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 148 transitions. Word has length 36 [2019-11-20 01:23:18,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:23:18,300 INFO L462 AbstractCegarLoop]: Abstraction has 139 states and 148 transitions. [2019-11-20 01:23:18,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 01:23:18,301 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 148 transitions. [2019-11-20 01:23:18,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-20 01:23:18,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:23:18,302 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:23:18,505 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:23:18,505 INFO L410 AbstractCegarLoop]: === Iteration 13 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:23:18,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:23:18,506 INFO L82 PathProgramCache]: Analyzing trace with hash 536962202, now seen corresponding path program 1 times [2019-11-20 01:23:18,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:23:18,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1982115427] [2019-11-20 01:23:18,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:23:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:23:18,746 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 01:23:18,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:23:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 01:23:18,773 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:23:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-11-20 01:23:18,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1982115427] [2019-11-20 01:23:18,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:23:18,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-20 01:23:18,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345487275] [2019-11-20 01:23:18,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 01:23:18,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:23:18,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 01:23:18,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-20 01:23:18,869 INFO L87 Difference]: Start difference. First operand 139 states and 148 transitions. Second operand 10 states. [2019-11-20 01:23:18,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:23:18,967 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2019-11-20 01:23:18,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 01:23:18,968 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2019-11-20 01:23:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:23:18,969 INFO L225 Difference]: With dead ends: 127 [2019-11-20 01:23:18,969 INFO L226 Difference]: Without dead ends: 127 [2019-11-20 01:23:18,969 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-11-20 01:23:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-20 01:23:18,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2019-11-20 01:23:18,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2019-11-20 01:23:18,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2019-11-20 01:23:18,974 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 47 [2019-11-20 01:23:18,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:23:18,974 INFO L462 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2019-11-20 01:23:18,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 01:23:18,974 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2019-11-20 01:23:18,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-20 01:23:18,975 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:23:18,975 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:23:19,182 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:23:19,183 INFO L410 AbstractCegarLoop]: === Iteration 14 === [dll_circular_appendErr17REQUIRES_VIOLATION, dll_circular_appendErr6REQUIRES_VIOLATION, dll_circular_appendErr7REQUIRES_VIOLATION, dll_circular_appendErr5REQUIRES_VIOLATION, dll_circular_appendErr16REQUIRES_VIOLATION, dll_circular_appendErr9REQUIRES_VIOLATION, dll_circular_appendErr20REQUIRES_VIOLATION, dll_circular_appendErr18REQUIRES_VIOLATION, dll_circular_appendErr19REQUIRES_VIOLATION, dll_circular_appendErr8REQUIRES_VIOLATION, dll_circular_appendErr1REQUIRES_VIOLATION, dll_circular_appendErr23REQUIRES_VIOLATION, dll_circular_appendErr22REQUIRES_VIOLATION, dll_circular_appendErr12REQUIRES_VIOLATION, dll_circular_appendErr10REQUIRES_VIOLATION, dll_circular_appendErr11REQUIRES_VIOLATION, dll_circular_appendErr0REQUIRES_VIOLATION, dll_circular_appendErr21REQUIRES_VIOLATION, dll_circular_appendErr14REQUIRES_VIOLATION, dll_circular_appendErr15REQUIRES_VIOLATION, dll_circular_appendErr4REQUIRES_VIOLATION, dll_circular_appendErr13REQUIRES_VIOLATION, dll_circular_appendErr2REQUIRES_VIOLATION, dll_circular_appendErr3REQUIRES_VIOLATION, dll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr2REQUIRES_VIOLATION, dll_circular_destroyErr3REQUIRES_VIOLATION, dll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr0REQUIRES_VIOLATION, dll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr1REQUIRES_VIOLATION, dll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE, dll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr10ENSURES_VIOLATIONMEMORY_LEAK, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, dll_circular_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 01:23:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:23:19,183 INFO L82 PathProgramCache]: Analyzing trace with hash 233581668, now seen corresponding path program 1 times [2019-11-20 01:23:19,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:23:19,183 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1215210833] [2019-11-20 01:23:19,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6ae45071-71e8-42a6-b811-7acc2c75f5f8/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 01:23:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:23:19,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 01:23:19,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:23:19,549 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 01:23:19,549 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:23:19,560 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:23:19,560 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:23:19,560 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 01:23:19,581 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2019-11-20 01:23:19,581 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:23:19,589 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:23:19,589 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 01:23:19,589 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2019-11-20 01:23:19,981 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 01:23:20,012 INFO L343 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2019-11-20 01:23:20,012 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 36 [2019-11-20 01:23:20,013 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:23:20,061 INFO L567 ElimStorePlain]: treesize reduction 4, result has 88.9 percent of original size [2019-11-20 01:23:20,061 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 01:23:20,061 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:34, output treesize:32 [2019-11-20 01:23:20,264 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 01:23:20,303 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:23:20,304 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 50 [2019-11-20 01:23:20,304 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:23:20,386 INFO L567 ElimStorePlain]: treesize reduction 28, result has 50.0 percent of original size [2019-11-20 01:23:20,387 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2019-11-20 01:23:20,387 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:28 [2019-11-20 01:23:20,430 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:23:20,431 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:23:43,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:23:43,384 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 01:23:43,388 INFO L168 Benchmark]: Toolchain (without parser) took 107739.98 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 200.8 MB). Free memory was 943.4 MB in the beginning and 994.1 MB in the end (delta: -50.6 MB). Peak memory consumption was 150.2 MB. Max. memory is 11.5 GB. [2019-11-20 01:23:43,388 INFO L168 Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:23:43,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 544.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -174.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-20 01:23:43,389 INFO L168 Benchmark]: Boogie Preprocessor took 62.88 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:23:43,389 INFO L168 Benchmark]: RCFGBuilder took 1045.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 77.5 MB). Peak memory consumption was 77.5 MB. Max. memory is 11.5 GB. [2019-11-20 01:23:43,389 INFO L168 Benchmark]: TraceAbstraction took 106083.32 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 59.8 MB). Free memory was 1.0 GB in the beginning and 994.1 MB in the end (delta: 46.6 MB). Peak memory consumption was 106.4 MB. Max. memory is 11.5 GB. [2019-11-20 01:23:43,391 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.61 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 544.30 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.0 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -174.7 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 62.88 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 1045.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 77.5 MB). Peak memory consumption was 77.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 106083.32 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 59.8 MB). Free memory was 1.0 GB in the beginning and 994.1 MB in the end (delta: 46.6 MB). Peak memory consumption was 106.4 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...