./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) 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_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 65263b67fd81174d35f819c28bc33cb1f3e6621f ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 08:54:26,708 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 08:54:26,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 08:54:26,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 08:54:26,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 08:54:26,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 08:54:26,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 08:54:26,735 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 08:54:26,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 08:54:26,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 08:54:26,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 08:54:26,740 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 08:54:26,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 08:54:26,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 08:54:26,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 08:54:26,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 08:54:26,744 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 08:54:26,745 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 08:54:26,746 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 08:54:26,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 08:54:26,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 08:54:26,753 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 08:54:26,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 08:54:26,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 08:54:26,760 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 08:54:26,761 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 08:54:26,761 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 08:54:26,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 08:54:26,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 08:54:26,764 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 08:54:26,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 08:54:26,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 08:54:26,767 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 08:54:26,768 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 08:54:26,771 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 08:54:26,771 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 08:54:26,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 08:54:26,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 08:54:26,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 08:54:26,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 08:54:26,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 08:54:26,776 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2019-11-20 08:54:26,805 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 08:54:26,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 08:54:26,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 08:54:26,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 08:54:26,807 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 08:54:26,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 08:54:26,807 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 08:54:26,807 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 08:54:26,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 08:54:26,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 08:54:26,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 08:54:26,808 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 08:54:26,808 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 08:54:26,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 08:54:26,808 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 08:54:26,809 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 08:54:26,809 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 08:54:26,809 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 08:54:26,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 08:54:26,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 08:54:26,810 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 08:54:26,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 08:54:26,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 08:54:26,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 08:54:26,810 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 08:54:26,810 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 08:54:26,811 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 08:54:26,811 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 08:54:26,811 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_cdefa640-b1f0-423e-8a01-24b2aa23ae53/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-memcleanup) ) 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 -> 65263b67fd81174d35f819c28bc33cb1f3e6621f [2019-11-20 08:54:26,956 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 08:54:26,970 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 08:54:26,973 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 08:54:26,974 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 08:54:26,974 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 08:54:26,975 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2019-11-20 08:54:27,024 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/data/8ec6eb43f/d7f81c8cd8d74f93be96693e39fa293c/FLAG935e9198d [2019-11-20 08:54:27,526 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 08:54:27,527 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2019-11-20 08:54:27,539 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/data/8ec6eb43f/d7f81c8cd8d74f93be96693e39fa293c/FLAG935e9198d [2019-11-20 08:54:27,822 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/data/8ec6eb43f/d7f81c8cd8d74f93be96693e39fa293c [2019-11-20 08:54:27,824 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 08:54:27,825 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 08:54:27,826 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 08:54:27,826 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 08:54:27,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 08:54:27,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:54:27" (1/1) ... [2019-11-20 08:54:27,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a535999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:27, skipping insertion in model container [2019-11-20 08:54:27,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:54:27" (1/1) ... [2019-11-20 08:54:27,837 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 08:54:27,873 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 08:54:28,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:54:28,238 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 08:54:28,300 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:54:28,355 INFO L192 MainTranslator]: Completed translation [2019-11-20 08:54:28,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:28 WrapperNode [2019-11-20 08:54:28,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 08:54:28,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 08:54:28,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 08:54:28,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 08:54:28,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:28" (1/1) ... [2019-11-20 08:54:28,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:28" (1/1) ... [2019-11-20 08:54:28,386 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:28" (1/1) ... [2019-11-20 08:54:28,386 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:28" (1/1) ... [2019-11-20 08:54:28,407 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:28" (1/1) ... [2019-11-20 08:54:28,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:28" (1/1) ... [2019-11-20 08:54:28,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:28" (1/1) ... [2019-11-20 08:54:28,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 08:54:28,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 08:54:28,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 08:54:28,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 08:54:28,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 08:54:28,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 08:54:28,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 08:54:28,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 08:54:28,484 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 08:54:28,484 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2019-11-20 08:54:28,484 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2019-11-20 08:54:28,485 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2019-11-20 08:54:28,485 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2019-11-20 08:54:28,485 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2019-11-20 08:54:28,485 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2019-11-20 08:54:28,486 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2019-11-20 08:54:28,486 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2019-11-20 08:54:28,486 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2019-11-20 08:54:28,486 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 08:54:28,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 08:54:28,487 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 08:54:28,487 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 08:54:28,487 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 08:54:28,487 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 08:54:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 08:54:28,492 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 08:54:28,493 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 08:54:28,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 08:54:28,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 08:54:28,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 08:54:28,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 08:54:28,493 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 08:54:28,494 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 08:54:28,494 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 08:54:28,494 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 08:54:28,494 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 08:54:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 08:54:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 08:54:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 08:54:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 08:54:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 08:54:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 08:54:28,495 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 08:54:28,496 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 08:54:28,496 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 08:54:28,496 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 08:54:28,496 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 08:54:28,496 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 08:54:28,496 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 08:54:28,496 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 08:54:28,498 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 08:54:28,498 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 08:54:28,498 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 08:54:28,498 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 08:54:28,498 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 08:54:28,498 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 08:54:28,499 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 08:54:28,499 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 08:54:28,499 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 08:54:28,499 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 08:54:28,499 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 08:54:28,499 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 08:54:28,499 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 08:54:28,500 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 08:54:28,500 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 08:54:28,500 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 08:54:28,500 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 08:54:28,500 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 08:54:28,500 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 08:54:28,501 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 08:54:28,501 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 08:54:28,501 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 08:54:28,501 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 08:54:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 08:54:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 08:54:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 08:54:28,502 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 08:54:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 08:54:28,503 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 08:54:28,504 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 08:54:28,504 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 08:54:28,505 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 08:54:28,505 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 08:54:28,505 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 08:54:28,505 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 08:54:28,506 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 08:54:28,506 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 08:54:28,506 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 08:54:28,506 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 08:54:28,506 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 08:54:28,506 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 08:54:28,507 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 08:54:28,507 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 08:54:28,507 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 08:54:28,507 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 08:54:28,507 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 08:54:28,508 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 08:54:28,508 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 08:54:28,508 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 08:54:28,508 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 08:54:28,508 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 08:54:28,508 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 08:54:28,508 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 08:54:28,508 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 08:54:28,509 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 08:54:28,509 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 08:54:28,509 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 08:54:28,509 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 08:54:28,509 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 08:54:28,509 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 08:54:28,509 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 08:54:28,510 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 08:54:28,510 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 08:54:28,510 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 08:54:28,510 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 08:54:28,510 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 08:54:28,510 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 08:54:28,510 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 08:54:28,510 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 08:54:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 08:54:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 08:54:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 08:54:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 08:54:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2019-11-20 08:54:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2019-11-20 08:54:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 08:54:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 08:54:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2019-11-20 08:54:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 08:54:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2019-11-20 08:54:28,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 08:54:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 08:54:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 08:54:28,513 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2019-11-20 08:54:28,514 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2019-11-20 08:54:28,514 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2019-11-20 08:54:28,515 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2019-11-20 08:54:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2019-11-20 08:54:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 08:54:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 08:54:28,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 08:54:29,650 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 08:54:29,650 INFO L285 CfgBuilder]: Removed 33 assume(true) statements. [2019-11-20 08:54:29,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:54:29 BoogieIcfgContainer [2019-11-20 08:54:29,651 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 08:54:29,652 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 08:54:29,652 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 08:54:29,655 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 08:54:29,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:54:27" (1/3) ... [2019-11-20 08:54:29,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3b7116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:54:29, skipping insertion in model container [2019-11-20 08:54:29,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:54:28" (2/3) ... [2019-11-20 08:54:29,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c3b7116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:54:29, skipping insertion in model container [2019-11-20 08:54:29,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:54:29" (3/3) ... [2019-11-20 08:54:29,663 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2019-11-20 08:54:29,671 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 08:54:29,682 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 82 error locations. [2019-11-20 08:54:29,690 INFO L249 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2019-11-20 08:54:29,706 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 08:54:29,706 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 08:54:29,706 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 08:54:29,706 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 08:54:29,706 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 08:54:29,707 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 08:54:29,707 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 08:54:29,707 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 08:54:29,730 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states. [2019-11-20 08:54:29,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 08:54:29,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:54:29,738 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:54:29,739 INFO L410 AbstractCegarLoop]: === Iteration 1 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 08:54:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:54:29,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1759871362, now seen corresponding path program 1 times [2019-11-20 08:54:29,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:54:29,755 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1030081087] [2019-11-20 08:54:29,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:54:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:54:29,990 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-20 08:54:29,995 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:54:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:54:30,014 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:54:30,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:54:30,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1030081087] [2019-11-20 08:54:30,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:54:30,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 08:54:30,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311483921] [2019-11-20 08:54:30,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 08:54:30,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:54:30,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 08:54:30,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 08:54:30,058 INFO L87 Difference]: Start difference. First operand 240 states. Second operand 2 states. [2019-11-20 08:54:30,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:54:30,123 INFO L93 Difference]: Finished difference Result 238 states and 259 transitions. [2019-11-20 08:54:30,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 08:54:30,125 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-20 08:54:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:54:30,147 INFO L225 Difference]: With dead ends: 238 [2019-11-20 08:54:30,147 INFO L226 Difference]: Without dead ends: 226 [2019-11-20 08:54:30,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 08:54:30,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-11-20 08:54:30,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2019-11-20 08:54:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-11-20 08:54:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 240 transitions. [2019-11-20 08:54:30,240 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 240 transitions. Word has length 10 [2019-11-20 08:54:30,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:54:30,241 INFO L462 AbstractCegarLoop]: Abstraction has 226 states and 240 transitions. [2019-11-20 08:54:30,241 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 08:54:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 240 transitions. [2019-11-20 08:54:30,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 08:54:30,242 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:54:30,242 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:54:30,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:54:30,448 INFO L410 AbstractCegarLoop]: === Iteration 2 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 08:54:30,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:54:30,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1404157798, now seen corresponding path program 1 times [2019-11-20 08:54:30,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:54:30,450 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [686749942] [2019-11-20 08:54:30,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:54:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:54:30,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 08:54:30,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:54:30,730 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:54:30,730 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:54:30,734 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:54:30,734 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:54:30,734 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:54:30,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:54:30,746 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:54:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:54:30,760 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [686749942] [2019-11-20 08:54:30,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:54:30,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 08:54:30,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535389288] [2019-11-20 08:54:30,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 08:54:30,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:54:30,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 08:54:30,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 08:54:30,763 INFO L87 Difference]: Start difference. First operand 226 states and 240 transitions. Second operand 3 states. [2019-11-20 08:54:31,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:54:31,092 INFO L93 Difference]: Finished difference Result 224 states and 238 transitions. [2019-11-20 08:54:31,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:54:31,093 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-20 08:54:31,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:54:31,095 INFO L225 Difference]: With dead ends: 224 [2019-11-20 08:54:31,095 INFO L226 Difference]: Without dead ends: 224 [2019-11-20 08:54:31,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 08:54:31,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-11-20 08:54:31,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2019-11-20 08:54:31,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2019-11-20 08:54:31,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 238 transitions. [2019-11-20 08:54:31,110 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 238 transitions. Word has length 14 [2019-11-20 08:54:31,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:54:31,110 INFO L462 AbstractCegarLoop]: Abstraction has 224 states and 238 transitions. [2019-11-20 08:54:31,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 08:54:31,111 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 238 transitions. [2019-11-20 08:54:31,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 08:54:31,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:54:31,111 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:54:31,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:54:31,312 INFO L410 AbstractCegarLoop]: === Iteration 3 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 08:54:31,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:54:31,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1404157797, now seen corresponding path program 1 times [2019-11-20 08:54:31,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:54:31,314 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [576693921] [2019-11-20 08:54:31,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:54:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:54:31,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 08:54:31,554 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:54:31,564 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:54:31,564 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:54:31,570 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:54:31,570 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:54:31,570 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:54:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:54:31,579 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:54:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:54:31,616 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [576693921] [2019-11-20 08:54:31,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:54:31,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 08:54:31,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188090710] [2019-11-20 08:54:31,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 08:54:31,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:54:31,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 08:54:31,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:54:31,618 INFO L87 Difference]: Start difference. First operand 224 states and 238 transitions. Second operand 4 states. [2019-11-20 08:54:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:54:32,172 INFO L93 Difference]: Finished difference Result 222 states and 236 transitions. [2019-11-20 08:54:32,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:54:32,173 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-20 08:54:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:54:32,174 INFO L225 Difference]: With dead ends: 222 [2019-11-20 08:54:32,175 INFO L226 Difference]: Without dead ends: 222 [2019-11-20 08:54:32,175 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:54:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-11-20 08:54:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2019-11-20 08:54:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-11-20 08:54:32,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 236 transitions. [2019-11-20 08:54:32,188 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 236 transitions. Word has length 14 [2019-11-20 08:54:32,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:54:32,188 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 236 transitions. [2019-11-20 08:54:32,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 08:54:32,188 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 236 transitions. [2019-11-20 08:54:32,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 08:54:32,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:54:32,189 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 08:54:32,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:54:32,392 INFO L410 AbstractCegarLoop]: === Iteration 4 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 08:54:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:54:32,393 INFO L82 PathProgramCache]: Analyzing trace with hash 576649219, now seen corresponding path program 1 times [2019-11-20 08:54:32,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:54:32,393 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2018563888] [2019-11-20 08:54:32,393 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:54:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:54:32,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 08:54:32,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:54:32,634 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:54:32,634 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:54:32,641 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:54:32,641 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:54:32,641 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:54:32,768 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 08:54:32,779 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:54:32,779 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 25 [2019-11-20 08:54:32,782 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:54:32,801 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 08:54:32,802 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:54:32,802 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2019-11-20 08:54:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:54:32,810 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:54:32,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:54:32,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2018563888] [2019-11-20 08:54:32,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:54:32,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 9 [2019-11-20 08:54:32,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366664270] [2019-11-20 08:54:32,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 08:54:32,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:54:32,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 08:54:32,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:54:32,977 INFO L87 Difference]: Start difference. First operand 222 states and 236 transitions. Second operand 10 states. [2019-11-20 08:54:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:54:44,779 INFO L93 Difference]: Finished difference Result 272 states and 296 transitions. [2019-11-20 08:54:44,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 08:54:44,779 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-11-20 08:54:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:54:44,782 INFO L225 Difference]: With dead ends: 272 [2019-11-20 08:54:44,783 INFO L226 Difference]: Without dead ends: 272 [2019-11-20 08:54:44,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-20 08:54:44,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-11-20 08:54:44,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 244. [2019-11-20 08:54:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2019-11-20 08:54:44,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 277 transitions. [2019-11-20 08:54:44,811 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 277 transitions. Word has length 20 [2019-11-20 08:54:44,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:54:44,812 INFO L462 AbstractCegarLoop]: Abstraction has 244 states and 277 transitions. [2019-11-20 08:54:44,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 08:54:44,812 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 277 transitions. [2019-11-20 08:54:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 08:54:44,813 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:54:44,813 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 08:54:45,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:54:45,022 INFO L410 AbstractCegarLoop]: === Iteration 5 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 08:54:45,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:54:45,022 INFO L82 PathProgramCache]: Analyzing trace with hash 576649220, now seen corresponding path program 1 times [2019-11-20 08:54:45,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:54:45,023 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [970924896] [2019-11-20 08:54:45,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:54:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:54:45,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 08:54:45,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:54:45,237 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:54:45,238 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:54:45,244 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:54:45,247 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:54:45,247 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:54:45,253 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:54:45,253 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:54:45,253 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 08:54:45,353 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:54:45,355 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 08:54:45,355 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:54:45,373 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:54:45,377 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:54:45,379 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 08:54:45,379 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:54:45,388 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:54:45,388 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:54:45,389 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:14 [2019-11-20 08:54:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:54:45,418 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:54:45,518 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 08:54:45,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:54:45,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:54:45,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 08:54:45,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 08:54:45,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:54:45,682 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 08:54:45,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 08:54:50,230 WARN L191 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2019-11-20 08:54:50,251 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:54:52,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:54:52,875 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [970924896] [2019-11-20 08:54:52,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:54:52,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2019-11-20 08:54:52,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78737238] [2019-11-20 08:54:52,876 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 08:54:52,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:54:52,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 08:54:52,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=148, Unknown=1, NotChecked=0, Total=182 [2019-11-20 08:54:52,877 INFO L87 Difference]: Start difference. First operand 244 states and 277 transitions. Second operand 14 states. [2019-11-20 08:54:58,885 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_chain_node_~ppnode.offset_BEFORE_CALL_2 (_ BitVec 32)) (|v_alloc_node_#t~malloc2.base_11| (_ BitVec 32)) (v_chain_node_~ppnode.base_BEFORE_CALL_4 (_ BitVec 32))) (let ((.cse0 (bvadd v_chain_node_~ppnode.offset_BEFORE_CALL_2 (_ bv4 32)))) (or (not (= (select |c_#valid| |v_alloc_node_#t~malloc2.base_11|) (_ bv0 1))) (exists ((v_prenex_1 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_prenex_1)) (not (bvsle (bvadd v_chain_node_~ppnode.offset_BEFORE_CALL_2 (_ bv4 32)) (select (store |c_old(#length)| v_prenex_1 (_ bv8 32)) v_chain_node_~ppnode.base_BEFORE_CALL_4))))) (bvsle .cse0 (select (store |c_#length| |v_alloc_node_#t~malloc2.base_11| (_ bv8 32)) v_chain_node_~ppnode.base_BEFORE_CALL_4)) (not (bvsle (_ bv0 32) v_chain_node_~ppnode.offset_BEFORE_CALL_2)) (not (bvsle v_chain_node_~ppnode.offset_BEFORE_CALL_2 .cse0))))) (exists ((|alloc_node_#t~malloc2.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |alloc_node_#t~malloc2.base|)) (= |c_#length| (store |c_old(#length)| |alloc_node_#t~malloc2.base| (_ bv8 32)))))) is different from false [2019-11-20 08:55:01,050 WARN L838 $PredicateComparison]: unable to prove that (and (or (bvsle (_ bv0 32) |c_chain_node_#in~ppnode.offset|) (forall ((|v_alloc_node_#t~malloc2.base_10| (_ BitVec 32))) (not (= (select |c_#valid| |v_alloc_node_#t~malloc2.base_10|) (_ bv0 1))))) (exists ((|alloc_node_#t~malloc2.base| (_ BitVec 32))) (= (_ bv8 32) (select |c_#length| |alloc_node_#t~malloc2.base|))) (forall ((v_prenex_4 (_ BitVec 32))) (or (not (= (select |c_#valid| v_prenex_4) (_ bv0 1))) (bvsle (bvadd |c_chain_node_#in~ppnode.offset| (_ bv4 32)) (select (store |c_#length| v_prenex_4 (_ bv8 32)) |c_chain_node_#in~ppnode.base|)))) (or (forall ((v_prenex_3 (_ BitVec 32))) (not (= (select |c_#valid| v_prenex_3) (_ bv0 1)))) (bvsle |c_chain_node_#in~ppnode.offset| (bvadd |c_chain_node_#in~ppnode.offset| (_ bv4 32)))) (exists ((|alloc_node_#t~malloc2.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |alloc_node_#t~malloc2.base|)) (= |c_#length| (store |c_old(#length)| |alloc_node_#t~malloc2.base| (_ bv8 32))))) (= (_ bv0 32) c_chain_node_~ppnode.offset) (= (_ bv4 32) (select |c_#length| c_chain_node_~ppnode.base))) is different from false [2019-11-20 08:55:06,599 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2019-11-20 08:55:17,158 WARN L191 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-11-20 08:55:29,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:29,472 INFO L93 Difference]: Finished difference Result 265 states and 303 transitions. [2019-11-20 08:55:29,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 08:55:29,472 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2019-11-20 08:55:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:29,475 INFO L225 Difference]: With dead ends: 265 [2019-11-20 08:55:29,475 INFO L226 Difference]: Without dead ends: 265 [2019-11-20 08:55:29,475 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=86, Invalid=339, Unknown=3, NotChecked=78, Total=506 [2019-11-20 08:55:29,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-11-20 08:55:29,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 260. [2019-11-20 08:55:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-11-20 08:55:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 299 transitions. [2019-11-20 08:55:29,486 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 299 transitions. Word has length 20 [2019-11-20 08:55:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:29,486 INFO L462 AbstractCegarLoop]: Abstraction has 260 states and 299 transitions. [2019-11-20 08:55:29,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 08:55:29,487 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 299 transitions. [2019-11-20 08:55:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 08:55:29,488 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:29,488 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, 1] [2019-11-20 08:55:29,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:29,690 INFO L410 AbstractCegarLoop]: === Iteration 6 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 08:55:29,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:29,691 INFO L82 PathProgramCache]: Analyzing trace with hash 696256979, now seen corresponding path program 1 times [2019-11-20 08:55:29,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:29,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [78259773] [2019-11-20 08:55:29,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:29,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 08:55:29,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:29,885 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:55:29,885 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:29,887 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:29,887 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:55:29,888 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:55:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:29,913 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:29,967 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [78259773] [2019-11-20 08:55:29,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:55:29,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 08:55:29,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438343200] [2019-11-20 08:55:29,967 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 08:55:29,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:29,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 08:55:29,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 08:55:29,968 INFO L87 Difference]: Start difference. First operand 260 states and 299 transitions. Second operand 6 states. [2019-11-20 08:55:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:30,387 INFO L93 Difference]: Finished difference Result 259 states and 296 transitions. [2019-11-20 08:55:30,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 08:55:30,388 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-20 08:55:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:30,390 INFO L225 Difference]: With dead ends: 259 [2019-11-20 08:55:30,390 INFO L226 Difference]: Without dead ends: 259 [2019-11-20 08:55:30,390 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 08:55:30,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-11-20 08:55:30,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2019-11-20 08:55:30,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2019-11-20 08:55:30,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 296 transitions. [2019-11-20 08:55:30,401 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 296 transitions. Word has length 21 [2019-11-20 08:55:30,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:30,401 INFO L462 AbstractCegarLoop]: Abstraction has 259 states and 296 transitions. [2019-11-20 08:55:30,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 08:55:30,401 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 296 transitions. [2019-11-20 08:55:30,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 08:55:30,402 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:30,402 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, 1] [2019-11-20 08:55:30,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:30,605 INFO L410 AbstractCegarLoop]: === Iteration 7 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 08:55:30,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:30,605 INFO L82 PathProgramCache]: Analyzing trace with hash 696256980, now seen corresponding path program 1 times [2019-11-20 08:55:30,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:30,605 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [323580387] [2019-11-20 08:55:30,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:30,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:30,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 08:55:30,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:30,795 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:55:30,795 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:30,801 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:30,802 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:55:30,802 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:55:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:30,852 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:31,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [323580387] [2019-11-20 08:55:31,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:55:31,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 08:55:31,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491591754] [2019-11-20 08:55:31,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 08:55:31,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:31,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 08:55:31,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:55:31,096 INFO L87 Difference]: Start difference. First operand 259 states and 296 transitions. Second operand 10 states. [2019-11-20 08:55:32,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:32,609 INFO L93 Difference]: Finished difference Result 258 states and 293 transitions. [2019-11-20 08:55:32,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 08:55:32,610 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-20 08:55:32,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:32,612 INFO L225 Difference]: With dead ends: 258 [2019-11-20 08:55:32,612 INFO L226 Difference]: Without dead ends: 258 [2019-11-20 08:55:32,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 08:55:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-11-20 08:55:32,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2019-11-20 08:55:32,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2019-11-20 08:55:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 293 transitions. [2019-11-20 08:55:32,622 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 293 transitions. Word has length 21 [2019-11-20 08:55:32,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:32,623 INFO L462 AbstractCegarLoop]: Abstraction has 258 states and 293 transitions. [2019-11-20 08:55:32,623 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 08:55:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 293 transitions. [2019-11-20 08:55:32,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 08:55:32,624 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:32,624 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:32,827 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:32,827 INFO L410 AbstractCegarLoop]: === Iteration 8 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 08:55:32,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:32,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1412322149, now seen corresponding path program 1 times [2019-11-20 08:55:32,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:32,828 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1668991859] [2019-11-20 08:55:32,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:33,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 08:55:33,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:33,056 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:33,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 08:55:33,170 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 08:55:33,171 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 08:55:33,181 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 08:55:33,181 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 08:55:33,202 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:33,202 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-20 08:55:33,203 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2019-11-20 08:55:33,320 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:33,321 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 08:55:33,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:55:33,322 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:55:33,322 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 08:55:33,354 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:33,354 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:55:33,355 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 08:55:33,355 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:30 [2019-11-20 08:55:33,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:55:33,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:55:33,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:55:33,634 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:55:33,732 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:55:33,844 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:55:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:33,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1668991859] [2019-11-20 08:55:33,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:55:33,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 08:55:33,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995464204] [2019-11-20 08:55:33,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 08:55:33,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:55:33,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 08:55:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:55:33,981 INFO L87 Difference]: Start difference. First operand 258 states and 293 transitions. Second operand 10 states. [2019-11-20 08:55:35,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:55:35,087 INFO L93 Difference]: Finished difference Result 255 states and 287 transitions. [2019-11-20 08:55:35,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 08:55:35,088 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-20 08:55:35,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:55:35,090 INFO L225 Difference]: With dead ends: 255 [2019-11-20 08:55:35,090 INFO L226 Difference]: Without dead ends: 255 [2019-11-20 08:55:35,091 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-20 08:55:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2019-11-20 08:55:35,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2019-11-20 08:55:35,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2019-11-20 08:55:35,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 287 transitions. [2019-11-20 08:55:35,100 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 287 transitions. Word has length 27 [2019-11-20 08:55:35,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:55:35,101 INFO L462 AbstractCegarLoop]: Abstraction has 255 states and 287 transitions. [2019-11-20 08:55:35,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 08:55:35,101 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 287 transitions. [2019-11-20 08:55:35,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 08:55:35,102 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:55:35,102 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:55:35,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:35,305 INFO L410 AbstractCegarLoop]: === Iteration 9 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 08:55:35,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:55:35,306 INFO L82 PathProgramCache]: Analyzing trace with hash 832313954, now seen corresponding path program 1 times [2019-11-20 08:55:35,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:55:35,306 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1163798023] [2019-11-20 08:55:35,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_cdefa640-b1f0-423e-8a01-24b2aa23ae53/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:55:35,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 08:55:35,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:55:35,562 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 08:55:35,562 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-20 08:55:35,562 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:35,566 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:35,567 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 08:55:35,567 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 08:55:35,623 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:35,623 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2019-11-20 08:55:35,624 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:35,640 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 08:55:35,641 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:55:35,641 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:11 [2019-11-20 08:55:35,777 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 08:55:35,798 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:55:35,799 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 50 [2019-11-20 08:55:35,799 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:55:35,819 INFO L567 ElimStorePlain]: treesize reduction 23, result has 41.0 percent of original size [2019-11-20 08:55:35,819 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 08:55:35,819 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2019-11-20 08:55:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:55:35,846 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:55:36,510 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:55:36,511 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Alternating quantifiers not yet supported at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 08:55:36,514 INFO L168 Benchmark]: Toolchain (without parser) took 68688.55 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 311.4 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -258.3 MB). Peak memory consumption was 53.1 MB. Max. memory is 11.5 GB. [2019-11-20 08:55:36,514 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 08:55:36,515 INFO L168 Benchmark]: CACSL2BoogieTranslator took 530.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -157.8 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-20 08:55:36,515 INFO L168 Benchmark]: Boogie Preprocessor took 73.16 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 08:55:36,516 INFO L168 Benchmark]: RCFGBuilder took 1221.43 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 99.8 MB). Peak memory consumption was 99.8 MB. Max. memory is 11.5 GB. [2019-11-20 08:55:36,516 INFO L168 Benchmark]: TraceAbstraction took 66860.41 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 178.8 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -200.3 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 08:55:36,518 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 530.26 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -157.8 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 73.16 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 1221.43 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: 99.8 MB). Peak memory consumption was 99.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 66860.41 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 178.8 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -200.3 MB). There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...