./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_append_equal.i -s /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/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 1c66d86f2cb93b92fe110cb1d9c29158a00f0747 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 08:27:30,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 08:27:30,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 08:27:30,100 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 08:27:30,100 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 08:27:30,101 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 08:27:30,103 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 08:27:30,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 08:27:30,108 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 08:27:30,109 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 08:27:30,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 08:27:30,111 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 08:27:30,111 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 08:27:30,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 08:27:30,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 08:27:30,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 08:27:30,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 08:27:30,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 08:27:30,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 08:27:30,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 08:27:30,133 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 08:27:30,134 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 08:27:30,135 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 08:27:30,136 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 08:27:30,138 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 08:27:30,138 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 08:27:30,139 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 08:27:30,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 08:27:30,140 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 08:27:30,141 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 08:27:30,141 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 08:27:30,141 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 08:27:30,142 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 08:27:30,143 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 08:27:30,144 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 08:27:30,144 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 08:27:30,145 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 08:27:30,145 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 08:27:30,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 08:27:30,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 08:27:30,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 08:27:30,154 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 08:27:30,179 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 08:27:30,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 08:27:30,180 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 08:27:30,181 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 08:27:30,181 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 08:27:30,181 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 08:27:30,181 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 08:27:30,181 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 08:27:30,182 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 08:27:30,182 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 08:27:30,182 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 08:27:30,182 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 08:27:30,182 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 08:27:30,182 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 08:27:30,183 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 08:27:30,183 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 08:27:30,183 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 08:27:30,183 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 08:27:30,183 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 08:27:30,184 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 08:27:30,184 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 08:27:30,184 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 08:27:30,184 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 08:27:30,184 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 08:27:30,184 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 08:27:30,185 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 08:27:30,185 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 08:27:30,185 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 08:27:30,185 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 08:27:30,185 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_90075fcd-c12c-47dd-89d7-917afa8e5a85/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 -> 1c66d86f2cb93b92fe110cb1d9c29158a00f0747 [2019-11-20 08:27:30,346 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 08:27:30,359 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 08:27:30,362 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 08:27:30,366 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 08:27:30,367 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 08:27:30,367 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/bin/uautomizer/../../sv-benchmarks/c/list-simple/sll2n_append_equal.i [2019-11-20 08:27:30,433 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/bin/uautomizer/data/ccf25f724/967b798cc9bf4bd1971a232d223ac7b1/FLAG1d2fe79d1 [2019-11-20 08:27:30,860 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 08:27:30,861 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2019-11-20 08:27:30,871 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/bin/uautomizer/data/ccf25f724/967b798cc9bf4bd1971a232d223ac7b1/FLAG1d2fe79d1 [2019-11-20 08:27:30,884 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/bin/uautomizer/data/ccf25f724/967b798cc9bf4bd1971a232d223ac7b1 [2019-11-20 08:27:30,886 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 08:27:30,887 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 08:27:30,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 08:27:30,888 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 08:27:30,891 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 08:27:30,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:27:30" (1/1) ... [2019-11-20 08:27:30,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d7b3d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:27:30, skipping insertion in model container [2019-11-20 08:27:30,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:27:30" (1/1) ... [2019-11-20 08:27:30,901 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 08:27:30,934 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 08:27:31,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:27:31,374 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 08:27:31,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:27:31,491 INFO L192 MainTranslator]: Completed translation [2019-11-20 08:27:31,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:27:31 WrapperNode [2019-11-20 08:27:31,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 08:27:31,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 08:27:31,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 08:27:31,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 08:27:31,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:27:31" (1/1) ... [2019-11-20 08:27:31,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:27:31" (1/1) ... [2019-11-20 08:27:31,527 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:27:31" (1/1) ... [2019-11-20 08:27:31,528 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:27:31" (1/1) ... [2019-11-20 08:27:31,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:27:31" (1/1) ... [2019-11-20 08:27:31,560 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:27:31" (1/1) ... [2019-11-20 08:27:31,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:27:31" (1/1) ... [2019-11-20 08:27:31,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 08:27:31,571 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 08:27:31,571 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 08:27:31,571 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 08:27:31,572 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:27:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/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 08:27:31,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 08:27:31,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 08:27:31,616 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 08:27:31,617 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 08:27:31,617 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 08:27:31,617 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-20 08:27:31,617 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-11-20 08:27:31,617 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2019-11-20 08:27:31,617 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2019-11-20 08:27:31,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 08:27:31,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 08:27:31,618 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 08:27:31,618 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 08:27:31,618 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 08:27:31,618 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 08:27:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 08:27:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 08:27:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 08:27:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 08:27:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 08:27:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 08:27:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 08:27:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 08:27:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 08:27:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 08:27:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 08:27:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 08:27:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 08:27:31,620 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 08:27:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 08:27:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 08:27:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 08:27:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 08:27:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 08:27:31,621 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 08:27:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 08:27:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 08:27:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 08:27:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 08:27:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 08:27:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 08:27:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 08:27:31,622 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 08:27:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 08:27:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 08:27:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 08:27:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 08:27:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 08:27:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 08:27:31,623 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 08:27:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 08:27:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 08:27:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 08:27:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 08:27:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 08:27:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 08:27:31,624 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 08:27:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 08:27:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 08:27:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 08:27:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 08:27:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 08:27:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 08:27:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 08:27:31,625 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 08:27:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 08:27:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 08:27:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 08:27:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 08:27:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 08:27:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 08:27:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 08:27:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 08:27:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 08:27:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 08:27:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 08:27:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 08:27:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 08:27:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 08:27:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 08:27:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 08:27:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 08:27:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 08:27:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 08:27:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 08:27:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 08:27:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 08:27:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 08:27:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 08:27:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 08:27:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 08:27:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 08:27:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 08:27:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 08:27:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 08:27:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 08:27:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 08:27:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 08:27:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 08:27:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 08:27:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 08:27:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 08:27:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 08:27:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 08:27:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 08:27:31,630 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 08:27:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 08:27:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 08:27:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 08:27:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 08:27:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 08:27:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 08:27:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 08:27:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 08:27:31,631 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 08:27:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 08:27:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 08:27:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-20 08:27:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 08:27:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 08:27:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 08:27:31,632 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-11-20 08:27:31,633 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2019-11-20 08:27:31,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 08:27:31,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 08:27:31,633 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2019-11-20 08:27:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 08:27:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 08:27:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 08:27:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 08:27:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 08:27:31,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 08:27:31,973 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 08:27:32,352 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 08:27:32,352 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 08:27:32,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:27:32 BoogieIcfgContainer [2019-11-20 08:27:32,353 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 08:27:32,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 08:27:32,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 08:27:32,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 08:27:32,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:27:30" (1/3) ... [2019-11-20 08:27:32,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39057d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:27:32, skipping insertion in model container [2019-11-20 08:27:32,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:27:31" (2/3) ... [2019-11-20 08:27:32,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39057d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:27:32, skipping insertion in model container [2019-11-20 08:27:32,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:27:32" (3/3) ... [2019-11-20 08:27:32,370 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2019-11-20 08:27:32,379 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 08:27:32,386 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 32 error locations. [2019-11-20 08:27:32,395 INFO L249 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2019-11-20 08:27:32,413 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 08:27:32,414 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 08:27:32,414 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 08:27:32,414 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 08:27:32,414 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 08:27:32,414 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 08:27:32,415 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 08:27:32,415 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 08:27:32,435 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states. [2019-11-20 08:27:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 08:27:32,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:27:32,446 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:27:32,446 INFO L410 AbstractCegarLoop]: === Iteration 1 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_appendErr9REQUIRES_VIOLATION, sll_appendErr4REQUIRES_VIOLATION, sll_appendErr2REQUIRES_VIOLATION, sll_appendErr8REQUIRES_VIOLATION, sll_appendErr3REQUIRES_VIOLATION, sll_appendErr6REQUIRES_VIOLATION, sll_appendErr1REQUIRES_VIOLATION, sll_appendErr7REQUIRES_VIOLATION, sll_appendErr10REQUIRES_VIOLATION, sll_appendErr5REQUIRES_VIOLATION, sll_appendErr0REQUIRES_VIOLATION, sll_appendErr11REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 08:27:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:27:32,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1247607763, now seen corresponding path program 1 times [2019-11-20 08:27:32,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:27:32,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [906422720] [2019-11-20 08:27:32,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/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 08:27:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:27:32,688 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 08:27:32,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:27:32,747 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 08:27:32,748 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:27:32,753 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:27:32,753 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:27:32,753 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:27:32,759 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 08:27:32,759 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:27:32,776 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 08:27:32,777 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [906422720] [2019-11-20 08:27:32,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:27:32,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 08:27:32,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467935474] [2019-11-20 08:27:32,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 08:27:32,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:27:32,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 08:27:32,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 08:27:32,798 INFO L87 Difference]: Start difference. First operand 101 states. Second operand 3 states. [2019-11-20 08:27:32,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:27:32,986 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2019-11-20 08:27:32,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:27:32,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-20 08:27:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:27:32,998 INFO L225 Difference]: With dead ends: 99 [2019-11-20 08:27:32,999 INFO L226 Difference]: Without dead ends: 92 [2019-11-20 08:27:33,000 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 08:27:33,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-20 08:27:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2019-11-20 08:27:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-20 08:27:33,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2019-11-20 08:27:33,071 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 13 [2019-11-20 08:27:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:27:33,071 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2019-11-20 08:27:33,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 08:27:33,072 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2019-11-20 08:27:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 08:27:33,073 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:27:33,073 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:27:33,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:27:33,276 INFO L410 AbstractCegarLoop]: === Iteration 2 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_appendErr9REQUIRES_VIOLATION, sll_appendErr4REQUIRES_VIOLATION, sll_appendErr2REQUIRES_VIOLATION, sll_appendErr8REQUIRES_VIOLATION, sll_appendErr3REQUIRES_VIOLATION, sll_appendErr6REQUIRES_VIOLATION, sll_appendErr1REQUIRES_VIOLATION, sll_appendErr7REQUIRES_VIOLATION, sll_appendErr10REQUIRES_VIOLATION, sll_appendErr5REQUIRES_VIOLATION, sll_appendErr0REQUIRES_VIOLATION, sll_appendErr11REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 08:27:33,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:27:33,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1247607762, now seen corresponding path program 1 times [2019-11-20 08:27:33,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:27:33,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2104354281] [2019-11-20 08:27:33,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/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 08:27:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:27:33,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 08:27:33,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:27:33,496 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 08:27:33,496 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:27:33,503 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:27:33,504 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:27:33,504 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:27:33,514 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 08:27:33,515 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:27:33,560 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 08:27:33,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2104354281] [2019-11-20 08:27:33,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:27:33,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 08:27:33,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121883703] [2019-11-20 08:27:33,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 08:27:33,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:27:33,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 08:27:33,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:27:33,563 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 4 states. [2019-11-20 08:27:33,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:27:33,879 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2019-11-20 08:27:33,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:27:33,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-20 08:27:33,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:27:33,882 INFO L225 Difference]: With dead ends: 90 [2019-11-20 08:27:33,883 INFO L226 Difference]: Without dead ends: 90 [2019-11-20 08:27:33,883 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 08:27:33,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-20 08:27:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2019-11-20 08:27:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-11-20 08:27:33,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2019-11-20 08:27:33,893 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 13 [2019-11-20 08:27:33,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:27:33,893 INFO L462 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2019-11-20 08:27:33,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 08:27:33,894 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2019-11-20 08:27:33,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 08:27:33,895 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:27:33,895 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 08:27:34,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:27:34,105 INFO L410 AbstractCegarLoop]: === Iteration 3 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_appendErr9REQUIRES_VIOLATION, sll_appendErr4REQUIRES_VIOLATION, sll_appendErr2REQUIRES_VIOLATION, sll_appendErr8REQUIRES_VIOLATION, sll_appendErr3REQUIRES_VIOLATION, sll_appendErr6REQUIRES_VIOLATION, sll_appendErr1REQUIRES_VIOLATION, sll_appendErr7REQUIRES_VIOLATION, sll_appendErr10REQUIRES_VIOLATION, sll_appendErr5REQUIRES_VIOLATION, sll_appendErr0REQUIRES_VIOLATION, sll_appendErr11REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 08:27:34,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:27:34,105 INFO L82 PathProgramCache]: Analyzing trace with hash -789981263, now seen corresponding path program 1 times [2019-11-20 08:27:34,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:27:34,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [893256177] [2019-11-20 08:27:34,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/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 08:27:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:27:34,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 08:27:34,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:27:34,344 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 08:27:34,344 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:27:34,351 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:27:34,351 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:27:34,351 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:27:34,390 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 08:27:34,390 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:27:34,458 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 08:27:34,459 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [893256177] [2019-11-20 08:27:34,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:27:34,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 08:27:34,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607449294] [2019-11-20 08:27:34,460 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 08:27:34,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:27:34,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 08:27:34,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 08:27:34,461 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 6 states. [2019-11-20 08:27:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:27:34,765 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2019-11-20 08:27:34,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 08:27:34,766 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-20 08:27:34,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:27:34,768 INFO L225 Difference]: With dead ends: 94 [2019-11-20 08:27:34,768 INFO L226 Difference]: Without dead ends: 94 [2019-11-20 08:27:34,769 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 08:27:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-20 08:27:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2019-11-20 08:27:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 08:27:34,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2019-11-20 08:27:34,779 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 19 [2019-11-20 08:27:34,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:27:34,779 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2019-11-20 08:27:34,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 08:27:34,780 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2019-11-20 08:27:34,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 08:27:34,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:27:34,787 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 08:27:34,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:27:34,991 INFO L410 AbstractCegarLoop]: === Iteration 4 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_appendErr9REQUIRES_VIOLATION, sll_appendErr4REQUIRES_VIOLATION, sll_appendErr2REQUIRES_VIOLATION, sll_appendErr8REQUIRES_VIOLATION, sll_appendErr3REQUIRES_VIOLATION, sll_appendErr6REQUIRES_VIOLATION, sll_appendErr1REQUIRES_VIOLATION, sll_appendErr7REQUIRES_VIOLATION, sll_appendErr10REQUIRES_VIOLATION, sll_appendErr5REQUIRES_VIOLATION, sll_appendErr0REQUIRES_VIOLATION, sll_appendErr11REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 08:27:34,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:27:34,991 INFO L82 PathProgramCache]: Analyzing trace with hash -789981262, now seen corresponding path program 1 times [2019-11-20 08:27:34,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:27:34,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2065658122] [2019-11-20 08:27:34,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/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 08:27:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:27:35,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 08:27:35,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:27:35,230 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 08:27:35,231 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:27:35,237 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:27:35,237 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:27:35,237 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:27:35,287 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 08:27:35,287 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:27:35,608 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 08:27:35,609 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2065658122] [2019-11-20 08:27:35,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:27:35,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 08:27:35,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714512859] [2019-11-20 08:27:35,610 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 08:27:35,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:27:35,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 08:27:35,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:27:35,610 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand 10 states. [2019-11-20 08:27:36,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:27:36,199 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2019-11-20 08:27:36,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 08:27:36,200 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2019-11-20 08:27:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:27:36,201 INFO L225 Difference]: With dead ends: 93 [2019-11-20 08:27:36,201 INFO L226 Difference]: Without dead ends: 93 [2019-11-20 08:27:36,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 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 08:27:36,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-11-20 08:27:36,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2019-11-20 08:27:36,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-20 08:27:36,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2019-11-20 08:27:36,208 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 19 [2019-11-20 08:27:36,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:27:36,209 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2019-11-20 08:27:36,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 08:27:36,209 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2019-11-20 08:27:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-20 08:27:36,210 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:27:36,210 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 08:27:36,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:27:36,411 INFO L410 AbstractCegarLoop]: === Iteration 5 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_appendErr9REQUIRES_VIOLATION, sll_appendErr4REQUIRES_VIOLATION, sll_appendErr2REQUIRES_VIOLATION, sll_appendErr8REQUIRES_VIOLATION, sll_appendErr3REQUIRES_VIOLATION, sll_appendErr6REQUIRES_VIOLATION, sll_appendErr1REQUIRES_VIOLATION, sll_appendErr7REQUIRES_VIOLATION, sll_appendErr10REQUIRES_VIOLATION, sll_appendErr5REQUIRES_VIOLATION, sll_appendErr0REQUIRES_VIOLATION, sll_appendErr11REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 08:27:36,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:27:36,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1657926396, now seen corresponding path program 1 times [2019-11-20 08:27:36,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:27:36,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1626944448] [2019-11-20 08:27:36,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/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 08:27:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:27:36,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 08:27:36,606 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:27:36,624 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 08:27:36,624 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:27:36,680 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 08:27:36,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1626944448] [2019-11-20 08:27:36,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:27:36,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-20 08:27:36,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022915021] [2019-11-20 08:27:36,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 08:27:36,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:27:36,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 08:27:36,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-20 08:27:36,681 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 7 states. [2019-11-20 08:27:36,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:27:36,739 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2019-11-20 08:27:36,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 08:27:36,741 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-11-20 08:27:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:27:36,742 INFO L225 Difference]: With dead ends: 97 [2019-11-20 08:27:36,742 INFO L226 Difference]: Without dead ends: 94 [2019-11-20 08:27:36,743 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 08:27:36,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-20 08:27:36,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2019-11-20 08:27:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-20 08:27:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2019-11-20 08:27:36,758 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 25 [2019-11-20 08:27:36,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:27:36,758 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2019-11-20 08:27:36,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 08:27:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2019-11-20 08:27:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 08:27:36,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:27:36,761 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 08:27:36,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:27:36,964 INFO L410 AbstractCegarLoop]: === Iteration 6 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_appendErr9REQUIRES_VIOLATION, sll_appendErr4REQUIRES_VIOLATION, sll_appendErr2REQUIRES_VIOLATION, sll_appendErr8REQUIRES_VIOLATION, sll_appendErr3REQUIRES_VIOLATION, sll_appendErr6REQUIRES_VIOLATION, sll_appendErr1REQUIRES_VIOLATION, sll_appendErr7REQUIRES_VIOLATION, sll_appendErr10REQUIRES_VIOLATION, sll_appendErr5REQUIRES_VIOLATION, sll_appendErr0REQUIRES_VIOLATION, sll_appendErr11REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 08:27:36,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:27:36,964 INFO L82 PathProgramCache]: Analyzing trace with hash 454281401, now seen corresponding path program 1 times [2019-11-20 08:27:36,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:27:36,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [483530888] [2019-11-20 08:27:36,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/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 08:27:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:27:37,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 08:27:37,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:27:37,252 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 08:27:37,252 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:27:37,399 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 08:27:37,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [483530888] [2019-11-20 08:27:37,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:27:37,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-11-20 08:27:37,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929785166] [2019-11-20 08:27:37,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 08:27:37,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:27:37,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 08:27:37,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-20 08:27:37,401 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand 9 states. [2019-11-20 08:27:37,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:27:37,549 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2019-11-20 08:27:37,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 08:27:37,549 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-11-20 08:27:37,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:27:37,552 INFO L225 Difference]: With dead ends: 103 [2019-11-20 08:27:37,552 INFO L226 Difference]: Without dead ends: 100 [2019-11-20 08:27:37,552 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 08:27:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-20 08:27:37,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2019-11-20 08:27:37,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-20 08:27:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2019-11-20 08:27:37,559 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 38 [2019-11-20 08:27:37,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:27:37,559 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2019-11-20 08:27:37,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 08:27:37,559 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2019-11-20 08:27:37,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-20 08:27:37,561 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:27:37,561 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 08:27:37,765 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:27:37,766 INFO L410 AbstractCegarLoop]: === Iteration 7 === [sll_destroyErr4ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_appendErr9REQUIRES_VIOLATION, sll_appendErr4REQUIRES_VIOLATION, sll_appendErr2REQUIRES_VIOLATION, sll_appendErr8REQUIRES_VIOLATION, sll_appendErr3REQUIRES_VIOLATION, sll_appendErr6REQUIRES_VIOLATION, sll_appendErr1REQUIRES_VIOLATION, sll_appendErr7REQUIRES_VIOLATION, sll_appendErr10REQUIRES_VIOLATION, sll_appendErr5REQUIRES_VIOLATION, sll_appendErr0REQUIRES_VIOLATION, sll_appendErr11REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-20 08:27:37,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:27:37,766 INFO L82 PathProgramCache]: Analyzing trace with hash -571347428, now seen corresponding path program 2 times [2019-11-20 08:27:37,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:27:37,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [512978128] [2019-11-20 08:27:37,767 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/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 08:27:38,067 ERROR L271 FreeRefinementEngine]: Caught known exception: Array theory solver does not yet support write-chains connecting two different constant arrays [2019-11-20 08:27:38,067 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288213790] [2019-11-20 08:27:38,067 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90075fcd-c12c-47dd-89d7-917afa8e5a85/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 08:27:38,294 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 08:27:38,294 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 08:27:38,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 08:27:38,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:27:38,310 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 08:27:38,310 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:27:38,312 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:27:38,312 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:27:38,312 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:27:38,442 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 08:27:38,511 INFO L343 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2019-11-20 08:27:38,512 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 08:27:38,513 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:27:38,555 INFO L567 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2019-11-20 08:27:38,556 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 08:27:38,556 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:20 [2019-11-20 08:27:38,721 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 08:27:38,753 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:27:38,754 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 08:27:38,755 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:27:38,796 INFO L567 ElimStorePlain]: treesize reduction 28, result has 41.7 percent of original size [2019-11-20 08:27:38,797 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 08:27:38,797 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:20 [2019-11-20 08:27:38,848 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 08:27:38,848 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:27:55,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 08:27:55,821 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 08:27:55,825 INFO L168 Benchmark]: Toolchain (without parser) took 24937.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 187.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -121.6 MB). Peak memory consumption was 65.6 MB. Max. memory is 11.5 GB. [2019-11-20 08:27:55,825 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 08:27:55,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 604.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -188.3 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-20 08:27:55,826 INFO L168 Benchmark]: Boogie Preprocessor took 78.19 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 08:27:55,826 INFO L168 Benchmark]: RCFGBuilder took 782.45 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 65.4 MB). Peak memory consumption was 65.4 MB. Max. memory is 11.5 GB. [2019-11-20 08:27:55,827 INFO L168 Benchmark]: TraceAbstraction took 23469.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -4.0 MB). Peak memory consumption was 32.7 MB. Max. memory is 11.5 GB. [2019-11-20 08:27:55,829 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 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 604.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 150.5 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -188.3 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 78.19 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 782.45 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: 65.4 MB). Peak memory consumption was 65.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 23469.19 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.7 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -4.0 MB). Peak memory consumption was 32.7 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...