./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i -s /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b1e80acb90dba1afece1695551c9c89d7adc1424 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 10:11:13,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 10:11:13,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 10:11:13,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 10:11:13,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 10:11:13,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 10:11:13,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 10:11:13,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 10:11:13,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 10:11:13,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 10:11:13,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 10:11:13,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 10:11:13,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 10:11:13,697 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 10:11:13,698 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 10:11:13,699 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 10:11:13,700 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 10:11:13,701 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 10:11:13,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 10:11:13,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 10:11:13,718 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 10:11:13,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 10:11:13,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 10:11:13,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 10:11:13,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 10:11:13,732 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 10:11:13,732 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 10:11:13,734 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 10:11:13,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 10:11:13,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 10:11:13,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 10:11:13,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 10:11:13,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 10:11:13,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 10:11:13,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 10:11:13,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 10:11:13,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 10:11:13,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 10:11:13,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 10:11:13,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 10:11:13,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 10:11:13,745 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 10:11:13,777 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 10:11:13,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 10:11:13,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 10:11:13,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 10:11:13,779 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 10:11:13,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 10:11:13,779 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 10:11:13,779 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 10:11:13,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 10:11:13,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 10:11:13,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 10:11:13,780 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 10:11:13,780 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 10:11:13,781 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 10:11:13,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 10:11:13,781 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 10:11:13,781 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 10:11:13,781 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 10:11:13,782 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 10:11:13,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 10:11:13,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 10:11:13,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 10:11:13,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 10:11:13,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 10:11:13,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 10:11:13,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 10:11:13,784 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 10:11:13,784 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 10:11:13,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 10:11:13,784 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_867680b9-c45f-4e6a-a55c-65e94a2d7192/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1e80acb90dba1afece1695551c9c89d7adc1424 [2019-11-20 10:11:13,962 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 10:11:13,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 10:11:13,979 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 10:11:13,981 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 10:11:13,981 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 10:11:13,984 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/bin/uautomizer/../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2019-11-20 10:11:14,059 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/bin/uautomizer/data/054d8f8a1/5b5c50eed80c4f0dbe289962f7b159b4/FLAG63636ca7d [2019-11-20 10:11:14,610 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 10:11:14,610 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2019-11-20 10:11:14,639 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/bin/uautomizer/data/054d8f8a1/5b5c50eed80c4f0dbe289962f7b159b4/FLAG63636ca7d [2019-11-20 10:11:14,949 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/bin/uautomizer/data/054d8f8a1/5b5c50eed80c4f0dbe289962f7b159b4 [2019-11-20 10:11:14,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 10:11:14,953 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 10:11:14,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 10:11:14,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 10:11:14,958 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 10:11:14,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:11:14" (1/1) ... [2019-11-20 10:11:14,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1998d4eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:11:14, skipping insertion in model container [2019-11-20 10:11:14,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:11:14" (1/1) ... [2019-11-20 10:11:14,971 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 10:11:15,034 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 10:11:15,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:11:15,538 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 10:11:15,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 10:11:15,688 INFO L192 MainTranslator]: Completed translation [2019-11-20 10:11:15,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:11:15 WrapperNode [2019-11-20 10:11:15,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 10:11:15,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 10:11:15,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 10:11:15,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 10:11:15,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:11:15" (1/1) ... [2019-11-20 10:11:15,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:11:15" (1/1) ... [2019-11-20 10:11:15,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:11:15" (1/1) ... [2019-11-20 10:11:15,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:11:15" (1/1) ... [2019-11-20 10:11:15,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:11:15" (1/1) ... [2019-11-20 10:11:15,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:11:15" (1/1) ... [2019-11-20 10:11:15,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:11:15" (1/1) ... [2019-11-20 10:11:15,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 10:11:15,766 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 10:11:15,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 10:11:15,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 10:11:15,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:11:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/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 10:11:15,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 10:11:15,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 10:11:15,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 10:11:15,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 10:11:15,843 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 10:11:15,843 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-20 10:11:15,843 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-11-20 10:11:15,843 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-11-20 10:11:15,844 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_prepend [2019-11-20 10:11:15,844 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 10:11:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 10:11:15,844 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 10:11:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 10:11:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 10:11:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 10:11:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 10:11:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 10:11:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 10:11:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 10:11:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 10:11:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 10:11:15,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 10:11:15,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 10:11:15,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 10:11:15,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 10:11:15,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 10:11:15,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 10:11:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 10:11:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 10:11:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 10:11:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 10:11:15,848 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 10:11:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 10:11:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 10:11:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 10:11:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 10:11:15,849 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 10:11:15,850 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 10:11:15,850 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 10:11:15,850 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 10:11:15,850 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 10:11:15,850 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 10:11:15,851 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 10:11:15,851 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 10:11:15,851 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 10:11:15,851 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 10:11:15,851 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 10:11:15,852 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 10:11:15,852 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 10:11:15,852 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 10:11:15,852 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 10:11:15,852 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 10:11:15,853 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 10:11:15,853 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 10:11:15,853 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 10:11:15,853 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 10:11:15,853 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 10:11:15,854 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 10:11:15,854 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 10:11:15,854 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 10:11:15,854 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 10:11:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 10:11:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 10:11:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 10:11:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 10:11:15,855 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 10:11:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 10:11:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 10:11:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 10:11:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 10:11:15,856 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 10:11:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 10:11:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 10:11:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 10:11:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 10:11:15,857 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 10:11:15,858 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 10:11:15,858 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 10:11:15,858 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 10:11:15,858 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 10:11:15,859 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 10:11:15,859 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 10:11:15,859 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 10:11:15,859 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 10:11:15,859 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 10:11:15,860 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 10:11:15,860 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 10:11:15,860 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 10:11:15,860 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 10:11:15,860 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 10:11:15,860 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 10:11:15,861 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 10:11:15,861 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 10:11:15,861 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 10:11:15,861 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 10:11:15,861 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 10:11:15,862 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 10:11:15,862 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 10:11:15,862 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 10:11:15,862 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 10:11:15,862 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 10:11:15,863 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 10:11:15,863 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 10:11:15,863 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 10:11:15,863 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 10:11:15,863 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 10:11:15,864 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 10:11:15,864 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 10:11:15,864 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 10:11:15,864 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 10:11:15,864 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 10:11:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 10:11:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 10:11:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 10:11:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 10:11:15,865 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 10:11:15,866 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 10:11:15,866 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-20 10:11:15,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 10:11:15,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 10:11:15,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 10:11:15,867 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-11-20 10:11:15,867 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-11-20 10:11:15,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 10:11:15,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 10:11:15,868 INFO L130 BoogieDeclarations]: Found specification of procedure sll_prepend [2019-11-20 10:11:15,868 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 10:11:15,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 10:11:15,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 10:11:15,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 10:11:15,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 10:11:15,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 10:11:16,342 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 10:11:16,793 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 10:11:16,793 INFO L285 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-20 10:11:16,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:11:16 BoogieIcfgContainer [2019-11-20 10:11:16,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 10:11:16,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 10:11:16,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 10:11:16,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 10:11:16,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:11:14" (1/3) ... [2019-11-20 10:11:16,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26448476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:11:16, skipping insertion in model container [2019-11-20 10:11:16,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:11:15" (2/3) ... [2019-11-20 10:11:16,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26448476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:11:16, skipping insertion in model container [2019-11-20 10:11:16,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:11:16" (3/3) ... [2019-11-20 10:11:16,817 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_unequal.i [2019-11-20 10:11:16,828 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 10:11:16,838 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 30 error locations. [2019-11-20 10:11:16,851 INFO L249 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2019-11-20 10:11:16,877 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 10:11:16,877 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 10:11:16,878 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 10:11:16,878 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 10:11:16,878 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 10:11:16,878 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 10:11:16,878 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 10:11:16,880 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 10:11:16,899 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states. [2019-11-20 10:11:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 10:11:16,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:11:16,909 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:11:16,909 INFO L410 AbstractCegarLoop]: === Iteration 1 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION, sll_prependErr4REQUIRES_VIOLATION, sll_prependErr3REQUIRES_VIOLATION, sll_prependErr2REQUIRES_VIOLATION, sll_prependErr1REQUIRES_VIOLATION, sll_prependErr0REQUIRES_VIOLATION, sll_prependErr5REQUIRES_VIOLATION]=== [2019-11-20 10:11:16,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:11:16,916 INFO L82 PathProgramCache]: Analyzing trace with hash -165044195, now seen corresponding path program 1 times [2019-11-20 10:11:16,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:11:16,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [49695552] [2019-11-20 10:11:16,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/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 10:11:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:11:17,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 10:11:17,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:11:17,295 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 10:11:17,296 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:11:17,312 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:11:17,313 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:11:17,313 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:11:17,328 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 10:11:17,328 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:11:17,346 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 10:11:17,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [49695552] [2019-11-20 10:11:17,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:11:17,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 10:11:17,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673349590] [2019-11-20 10:11:17,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 10:11:17,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:11:17,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 10:11:17,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 10:11:17,375 INFO L87 Difference]: Start difference. First operand 97 states. Second operand 3 states. [2019-11-20 10:11:17,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:11:17,571 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2019-11-20 10:11:17,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 10:11:17,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-20 10:11:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:11:17,587 INFO L225 Difference]: With dead ends: 95 [2019-11-20 10:11:17,587 INFO L226 Difference]: Without dead ends: 88 [2019-11-20 10:11:17,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 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 10:11:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-20 10:11:17,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-11-20 10:11:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-20 10:11:17,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2019-11-20 10:11:17,640 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 13 [2019-11-20 10:11:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:11:17,640 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2019-11-20 10:11:17,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 10:11:17,641 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2019-11-20 10:11:17,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 10:11:17,641 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:11:17,642 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:11:17,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:11:17,846 INFO L410 AbstractCegarLoop]: === Iteration 2 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION, sll_prependErr4REQUIRES_VIOLATION, sll_prependErr3REQUIRES_VIOLATION, sll_prependErr2REQUIRES_VIOLATION, sll_prependErr1REQUIRES_VIOLATION, sll_prependErr0REQUIRES_VIOLATION, sll_prependErr5REQUIRES_VIOLATION]=== [2019-11-20 10:11:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:11:17,847 INFO L82 PathProgramCache]: Analyzing trace with hash -165044194, now seen corresponding path program 1 times [2019-11-20 10:11:17,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:11:17,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2014572950] [2019-11-20 10:11:17,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/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 10:11:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:11:18,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 10:11:18,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:11:18,122 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 10:11:18,123 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:11:18,132 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:11:18,132 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:11:18,133 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 10:11:18,147 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 10:11:18,148 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:11:18,215 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 10:11:18,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2014572950] [2019-11-20 10:11:18,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:11:18,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 10:11:18,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474740414] [2019-11-20 10:11:18,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 10:11:18,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:11:18,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 10:11:18,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 10:11:18,219 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand 4 states. [2019-11-20 10:11:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:11:18,539 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2019-11-20 10:11:18,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 10:11:18,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-20 10:11:18,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:11:18,545 INFO L225 Difference]: With dead ends: 86 [2019-11-20 10:11:18,545 INFO L226 Difference]: Without dead ends: 86 [2019-11-20 10:11:18,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 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 10:11:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-20 10:11:18,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2019-11-20 10:11:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-20 10:11:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2019-11-20 10:11:18,560 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 13 [2019-11-20 10:11:18,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:11:18,561 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2019-11-20 10:11:18,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 10:11:18,561 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2019-11-20 10:11:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 10:11:18,562 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:11:18,563 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:11:18,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:11:18,765 INFO L410 AbstractCegarLoop]: === Iteration 3 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION, sll_prependErr4REQUIRES_VIOLATION, sll_prependErr3REQUIRES_VIOLATION, sll_prependErr2REQUIRES_VIOLATION, sll_prependErr1REQUIRES_VIOLATION, sll_prependErr0REQUIRES_VIOLATION, sll_prependErr5REQUIRES_VIOLATION]=== [2019-11-20 10:11:18,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:11:18,766 INFO L82 PathProgramCache]: Analyzing trace with hash 312968081, now seen corresponding path program 1 times [2019-11-20 10:11:18,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:11:18,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [332212847] [2019-11-20 10:11:18,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/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 10:11:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:11:19,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 10:11:19,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:11:19,054 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 10:11:19,054 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:11:19,057 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:11:19,058 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:11:19,058 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:11:19,102 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 10:11:19,102 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:11:19,206 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 10:11:19,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [332212847] [2019-11-20 10:11:19,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:11:19,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 10:11:19,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037812929] [2019-11-20 10:11:19,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 10:11:19,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:11:19,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 10:11:19,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 10:11:19,209 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 6 states. [2019-11-20 10:11:19,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:11:19,743 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2019-11-20 10:11:19,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 10:11:19,744 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-20 10:11:19,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:11:19,747 INFO L225 Difference]: With dead ends: 90 [2019-11-20 10:11:19,748 INFO L226 Difference]: Without dead ends: 90 [2019-11-20 10:11:19,748 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 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 10:11:19,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-20 10:11:19,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2019-11-20 10:11:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-20 10:11:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2019-11-20 10:11:19,761 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 19 [2019-11-20 10:11:19,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:11:19,761 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2019-11-20 10:11:19,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 10:11:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2019-11-20 10:11:19,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 10:11:19,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:11:19,763 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:11:19,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:11:19,975 INFO L410 AbstractCegarLoop]: === Iteration 4 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION, sll_prependErr4REQUIRES_VIOLATION, sll_prependErr3REQUIRES_VIOLATION, sll_prependErr2REQUIRES_VIOLATION, sll_prependErr1REQUIRES_VIOLATION, sll_prependErr0REQUIRES_VIOLATION, sll_prependErr5REQUIRES_VIOLATION]=== [2019-11-20 10:11:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:11:19,975 INFO L82 PathProgramCache]: Analyzing trace with hash 312968082, now seen corresponding path program 1 times [2019-11-20 10:11:19,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:11:19,976 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2117162191] [2019-11-20 10:11:19,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/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 10:11:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:11:20,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 10:11:20,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:11:20,260 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 10:11:20,261 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:11:20,266 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:11:20,267 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:11:20,267 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 10:11:20,330 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 10:11:20,330 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:11:20,740 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 10:11:20,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2117162191] [2019-11-20 10:11:20,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:11:20,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 10:11:20,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141338041] [2019-11-20 10:11:20,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 10:11:20,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:11:20,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 10:11:20,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 10:11:20,742 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 10 states. [2019-11-20 10:11:21,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:11:21,547 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2019-11-20 10:11:21,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 10:11:21,549 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2019-11-20 10:11:21,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:11:21,550 INFO L225 Difference]: With dead ends: 89 [2019-11-20 10:11:21,550 INFO L226 Difference]: Without dead ends: 89 [2019-11-20 10:11:21,551 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 10:11:21,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-20 10:11:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2019-11-20 10:11:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-20 10:11:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2019-11-20 10:11:21,559 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 19 [2019-11-20 10:11:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:11:21,560 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2019-11-20 10:11:21,560 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 10:11:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2019-11-20 10:11:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-20 10:11:21,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:11:21,561 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] [2019-11-20 10:11:21,763 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:11:21,763 INFO L410 AbstractCegarLoop]: === Iteration 5 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION, sll_prependErr4REQUIRES_VIOLATION, sll_prependErr3REQUIRES_VIOLATION, sll_prependErr2REQUIRES_VIOLATION, sll_prependErr1REQUIRES_VIOLATION, sll_prependErr0REQUIRES_VIOLATION, sll_prependErr5REQUIRES_VIOLATION]=== [2019-11-20 10:11:21,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:11:21,763 INFO L82 PathProgramCache]: Analyzing trace with hash 812001672, now seen corresponding path program 1 times [2019-11-20 10:11:21,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:11:21,764 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [694937244] [2019-11-20 10:11:21,764 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/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 10:11:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:11:21,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 10:11:21,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:11:22,020 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 10:11:22,021 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:11:22,090 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 10:11:22,090 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [694937244] [2019-11-20 10:11:22,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 10:11:22,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-20 10:11:22,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95927242] [2019-11-20 10:11:22,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 10:11:22,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:11:22,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 10:11:22,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-20 10:11:22,092 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 7 states. [2019-11-20 10:11:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:11:22,139 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2019-11-20 10:11:22,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 10:11:22,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-20 10:11:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:11:22,142 INFO L225 Difference]: With dead ends: 93 [2019-11-20 10:11:22,142 INFO L226 Difference]: Without dead ends: 90 [2019-11-20 10:11:22,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-20 10:11:22,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-20 10:11:22,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2019-11-20 10:11:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-20 10:11:22,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2019-11-20 10:11:22,149 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 25 [2019-11-20 10:11:22,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:11:22,149 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2019-11-20 10:11:22,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 10:11:22,149 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2019-11-20 10:11:22,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 10:11:22,151 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:11:22,151 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:11:22,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:11:22,354 INFO L410 AbstractCegarLoop]: === Iteration 6 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION, sll_prependErr4REQUIRES_VIOLATION, sll_prependErr3REQUIRES_VIOLATION, sll_prependErr2REQUIRES_VIOLATION, sll_prependErr1REQUIRES_VIOLATION, sll_prependErr0REQUIRES_VIOLATION, sll_prependErr5REQUIRES_VIOLATION]=== [2019-11-20 10:11:22,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:11:22,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1663956357, now seen corresponding path program 1 times [2019-11-20 10:11:22,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:11:22,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1657708856] [2019-11-20 10:11:22,355 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/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 10:11:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 10:11:22,603 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 10:11:22,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:11:22,662 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 10:11:22,663 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:11:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 10:11:22,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1657708856] [2019-11-20 10:11:22,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 10:11:22,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-11-20 10:11:22,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998595715] [2019-11-20 10:11:22,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 10:11:22,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 10:11:22,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 10:11:22,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-20 10:11:22,798 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 9 states. [2019-11-20 10:11:22,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 10:11:22,917 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2019-11-20 10:11:22,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 10:11:22,918 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-11-20 10:11:22,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 10:11:22,919 INFO L225 Difference]: With dead ends: 99 [2019-11-20 10:11:22,919 INFO L226 Difference]: Without dead ends: 96 [2019-11-20 10:11:22,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-20 10:11:22,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-20 10:11:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2019-11-20 10:11:22,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-20 10:11:22,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-11-20 10:11:22,928 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 38 [2019-11-20 10:11:22,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 10:11:22,928 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-11-20 10:11:22,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 10:11:22,929 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-11-20 10:11:22,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-20 10:11:22,930 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 10:11:22,930 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 10:11:23,133 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 10:11:23,134 INFO L410 AbstractCegarLoop]: === Iteration 7 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr12ENSURES_VIOLATIONMEMORY_LEAK, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION, sll_prependErr4REQUIRES_VIOLATION, sll_prependErr3REQUIRES_VIOLATION, sll_prependErr2REQUIRES_VIOLATION, sll_prependErr1REQUIRES_VIOLATION, sll_prependErr0REQUIRES_VIOLATION, sll_prependErr5REQUIRES_VIOLATION]=== [2019-11-20 10:11:23,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 10:11:23,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1121471656, now seen corresponding path program 2 times [2019-11-20 10:11:23,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 10:11:23,134 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1856633643] [2019-11-20 10:11:23,134 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/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 10:11:23,453 ERROR L271 FreeRefinementEngine]: Caught known exception: Array theory solver does not yet support write-chains connecting two different constant arrays [2019-11-20 10:11:23,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140196809] [2019-11-20 10:11:23,453 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_867680b9-c45f-4e6a-a55c-65e94a2d7192/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:11:23,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 10:11:23,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 10:11:23,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 10:11:23,733 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 10:11:23,740 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 10:11:23,740 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:11:23,742 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:11:23,742 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 10:11:23,742 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 10:11:23,948 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 10:11:24,015 INFO L343 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2019-11-20 10:11:24,016 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 4 case distinctions, treesize of input 22 treesize of output 44 [2019-11-20 10:11:24,017 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:11:24,064 INFO L567 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2019-11-20 10:11:24,065 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 10:11:24,066 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:20 [2019-11-20 10:11:24,298 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 10:11:24,347 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 10:11:24,348 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 45 [2019-11-20 10:11:24,349 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 10:11:24,412 INFO L567 ElimStorePlain]: treesize reduction 28, result has 41.7 percent of original size [2019-11-20 10:11:24,413 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 10:11:24,413 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:20 [2019-11-20 10:11:24,481 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 10:11:24,481 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 10:11:43,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 10:11:43,469 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 10:11:43,472 INFO L168 Benchmark]: Toolchain (without parser) took 28519.76 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 180.4 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -108.5 MB). Peak memory consumption was 71.8 MB. Max. memory is 11.5 GB. [2019-11-20 10:11:43,473 INFO L168 Benchmark]: CDTParser took 1.61 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 10:11:43,473 INFO L168 Benchmark]: CACSL2BoogieTranslator took 736.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -171.4 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-20 10:11:43,474 INFO L168 Benchmark]: Boogie Preprocessor took 75.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 10:11:43,474 INFO L168 Benchmark]: RCFGBuilder took 1029.00 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 60.0 MB). Peak memory consumption was 60.0 MB. Max. memory is 11.5 GB. [2019-11-20 10:11:43,475 INFO L168 Benchmark]: TraceAbstraction took 26675.25 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 41.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -2.5 MB). Peak memory consumption was 38.9 MB. Max. memory is 11.5 GB. [2019-11-20 10:11:43,478 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.61 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 736.14 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -171.4 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 75.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 1029.00 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 60.0 MB). Peak memory consumption was 60.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 26675.25 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 41.4 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -2.5 MB). Peak memory consumption was 38.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...