./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.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_d2cbde83-06cd-490f-9fb4-6174712368d8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/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 1dce1ce44ca1491c0193a7993733791efa122195 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 04:50:33,576 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 04:50:33,577 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 04:50:33,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 04:50:33,592 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 04:50:33,593 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 04:50:33,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 04:50:33,603 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 04:50:33,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 04:50:33,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 04:50:33,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 04:50:33,615 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 04:50:33,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 04:50:33,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 04:50:33,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 04:50:33,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 04:50:33,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 04:50:33,621 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 04:50:33,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 04:50:33,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 04:50:33,630 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 04:50:33,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 04:50:33,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 04:50:33,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 04:50:33,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 04:50:33,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 04:50:33,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 04:50:33,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 04:50:33,642 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 04:50:33,643 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 04:50:33,644 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 04:50:33,644 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 04:50:33,645 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 04:50:33,646 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 04:50:33,647 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 04:50:33,647 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 04:50:33,648 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 04:50:33,648 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 04:50:33,648 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 04:50:33,649 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 04:50:33,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 04:50:33,651 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 04:50:33,676 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 04:50:33,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 04:50:33,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 04:50:33,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 04:50:33,677 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 04:50:33,677 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 04:50:33,678 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 04:50:33,678 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 04:50:33,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 04:50:33,678 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 04:50:33,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 04:50:33,679 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 04:50:33,679 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 04:50:33,679 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 04:50:33,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 04:50:33,679 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 04:50:33,679 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 04:50:33,680 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 04:50:33,680 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 04:50:33,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 04:50:33,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 04:50:33,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 04:50:33,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 04:50:33,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 04:50:33,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 04:50:33,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 04:50:33,681 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 04:50:33,681 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 04:50:33,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 04:50:33,682 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_d2cbde83-06cd-490f-9fb4-6174712368d8/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 -> 1dce1ce44ca1491c0193a7993733791efa122195 [2019-11-20 04:50:33,855 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 04:50:33,865 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 04:50:33,868 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 04:50:33,869 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 04:50:33,869 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 04:50:33,870 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/bin/uautomizer/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2019-11-20 04:50:33,928 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/bin/uautomizer/data/3fe1df9b7/71bddc6611a2442ba1dfdd3cd7321062/FLAGb82b2106c [2019-11-20 04:50:34,415 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 04:50:34,416 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2019-11-20 04:50:34,431 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/bin/uautomizer/data/3fe1df9b7/71bddc6611a2442ba1dfdd3cd7321062/FLAGb82b2106c [2019-11-20 04:50:34,944 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/bin/uautomizer/data/3fe1df9b7/71bddc6611a2442ba1dfdd3cd7321062 [2019-11-20 04:50:34,946 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 04:50:34,947 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 04:50:34,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 04:50:34,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 04:50:34,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 04:50:34,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:50:34" (1/1) ... [2019-11-20 04:50:34,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d4fef6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:50:34, skipping insertion in model container [2019-11-20 04:50:34,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 04:50:34" (1/1) ... [2019-11-20 04:50:34,961 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 04:50:34,998 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 04:50:35,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:50:35,382 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 04:50:35,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 04:50:35,494 INFO L192 MainTranslator]: Completed translation [2019-11-20 04:50:35,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:50:35 WrapperNode [2019-11-20 04:50:35,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 04:50:35,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 04:50:35,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 04:50:35,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 04:50:35,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:50:35" (1/1) ... [2019-11-20 04:50:35,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:50:35" (1/1) ... [2019-11-20 04:50:35,531 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:50:35" (1/1) ... [2019-11-20 04:50:35,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:50:35" (1/1) ... [2019-11-20 04:50:35,569 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:50:35" (1/1) ... [2019-11-20 04:50:35,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:50:35" (1/1) ... [2019-11-20 04:50:35,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:50:35" (1/1) ... [2019-11-20 04:50:35,602 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 04:50:35,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 04:50:35,603 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 04:50:35,603 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 04:50:35,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:50:35" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/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 04:50:35,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 04:50:35,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 04:50:35,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 04:50:35,662 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 04:50:35,662 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2019-11-20 04:50:35,662 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2019-11-20 04:50:35,663 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2019-11-20 04:50:35,663 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2019-11-20 04:50:35,663 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2019-11-20 04:50:35,663 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2019-11-20 04:50:35,664 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2019-11-20 04:50:35,664 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2019-11-20 04:50:35,664 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2019-11-20 04:50:35,664 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 04:50:35,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 04:50:35,665 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 04:50:35,665 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 04:50:35,665 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 04:50:35,665 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 04:50:35,665 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 04:50:35,666 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 04:50:35,666 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 04:50:35,666 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 04:50:35,666 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 04:50:35,666 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 04:50:35,666 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 04:50:35,667 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 04:50:35,667 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 04:50:35,667 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 04:50:35,667 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 04:50:35,667 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 04:50:35,668 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 04:50:35,668 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 04:50:35,668 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 04:50:35,668 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 04:50:35,668 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 04:50:35,668 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 04:50:35,669 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 04:50:35,669 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 04:50:35,669 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 04:50:35,669 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 04:50:35,669 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 04:50:35,669 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 04:50:35,670 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 04:50:35,670 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 04:50:35,670 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 04:50:35,670 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 04:50:35,670 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 04:50:35,671 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 04:50:35,671 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 04:50:35,671 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 04:50:35,671 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 04:50:35,671 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 04:50:35,671 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 04:50:35,672 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 04:50:35,672 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 04:50:35,672 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 04:50:35,672 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 04:50:35,672 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 04:50:35,672 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 04:50:35,673 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 04:50:35,673 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 04:50:35,673 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 04:50:35,673 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 04:50:35,673 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 04:50:35,673 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 04:50:35,674 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 04:50:35,674 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 04:50:35,674 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 04:50:35,674 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 04:50:35,674 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 04:50:35,675 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 04:50:35,675 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 04:50:35,675 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 04:50:35,675 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 04:50:35,675 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 04:50:35,675 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 04:50:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 04:50:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 04:50:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 04:50:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 04:50:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 04:50:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 04:50:35,677 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 04:50:35,677 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 04:50:35,677 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 04:50:35,677 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 04:50:35,677 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 04:50:35,677 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 04:50:35,678 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 04:50:35,678 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 04:50:35,678 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 04:50:35,678 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 04:50:35,678 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 04:50:35,678 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 04:50:35,679 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 04:50:35,679 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 04:50:35,679 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 04:50:35,679 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 04:50:35,679 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 04:50:35,679 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 04:50:35,680 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 04:50:35,680 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 04:50:35,680 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 04:50:35,680 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 04:50:35,680 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 04:50:35,680 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 04:50:35,681 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 04:50:35,681 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 04:50:35,681 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 04:50:35,681 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 04:50:35,681 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 04:50:35,681 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 04:50:35,682 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 04:50:35,682 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 04:50:35,682 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 04:50:35,682 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 04:50:35,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 04:50:35,682 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2019-11-20 04:50:35,683 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2019-11-20 04:50:35,683 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 04:50:35,683 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 04:50:35,683 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2019-11-20 04:50:35,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 04:50:35,683 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2019-11-20 04:50:35,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 04:50:35,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 04:50:35,684 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 04:50:35,684 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2019-11-20 04:50:35,684 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2019-11-20 04:50:35,684 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2019-11-20 04:50:35,685 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2019-11-20 04:50:35,685 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2019-11-20 04:50:35,685 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 04:50:35,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 04:50:35,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 04:50:36,871 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 04:50:36,871 INFO L285 CfgBuilder]: Removed 33 assume(true) statements. [2019-11-20 04:50:36,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:50:36 BoogieIcfgContainer [2019-11-20 04:50:36,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 04:50:36,874 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 04:50:36,874 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 04:50:36,876 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 04:50:36,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 04:50:34" (1/3) ... [2019-11-20 04:50:36,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32770694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:50:36, skipping insertion in model container [2019-11-20 04:50:36,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 04:50:35" (2/3) ... [2019-11-20 04:50:36,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32770694 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 04:50:36, skipping insertion in model container [2019-11-20 04:50:36,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 04:50:36" (3/3) ... [2019-11-20 04:50:36,884 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2019-11-20 04:50:36,893 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 04:50:36,903 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 82 error locations. [2019-11-20 04:50:36,915 INFO L249 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2019-11-20 04:50:36,933 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 04:50:36,933 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 04:50:36,933 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 04:50:36,934 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 04:50:36,934 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 04:50:36,934 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 04:50:36,934 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 04:50:36,934 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 04:50:36,964 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states. [2019-11-20 04:50:36,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 04:50:36,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:36,972 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:50:36,973 INFO L410 AbstractCegarLoop]: === Iteration 1 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 04:50:36,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:36,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1759871362, now seen corresponding path program 1 times [2019-11-20 04:50:36,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:50:36,989 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1030290149] [2019-11-20 04:50:36,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/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 04:50:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:37,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-20 04:50:37,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:37,233 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 04:50:37,233 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:50:37,247 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 04:50:37,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1030290149] [2019-11-20 04:50:37,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:50:37,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 04:50:37,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151375254] [2019-11-20 04:50:37,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 04:50:37,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:50:37,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 04:50:37,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 04:50:37,271 INFO L87 Difference]: Start difference. First operand 240 states. Second operand 2 states. [2019-11-20 04:50:37,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:37,333 INFO L93 Difference]: Finished difference Result 238 states and 259 transitions. [2019-11-20 04:50:37,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 04:50:37,334 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-20 04:50:37,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:37,348 INFO L225 Difference]: With dead ends: 238 [2019-11-20 04:50:37,348 INFO L226 Difference]: Without dead ends: 226 [2019-11-20 04:50:37,350 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 04:50:37,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-11-20 04:50:37,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2019-11-20 04:50:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2019-11-20 04:50:37,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 240 transitions. [2019-11-20 04:50:37,402 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 240 transitions. Word has length 10 [2019-11-20 04:50:37,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:37,402 INFO L462 AbstractCegarLoop]: Abstraction has 226 states and 240 transitions. [2019-11-20 04:50:37,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 04:50:37,402 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 240 transitions. [2019-11-20 04:50:37,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 04:50:37,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:37,406 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:50:37,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:50:37,607 INFO L410 AbstractCegarLoop]: === Iteration 2 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 04:50:37,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:37,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1404157798, now seen corresponding path program 1 times [2019-11-20 04:50:37,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:50:37,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [823258596] [2019-11-20 04:50:37,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/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 04:50:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:37,851 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 04:50:37,853 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:37,917 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 04:50:37,924 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:50:37,928 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:50:37,928 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:50:37,929 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 04:50:37,938 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 04:50:37,938 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:50:37,952 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 04:50:37,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [823258596] [2019-11-20 04:50:37,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:50:37,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 04:50:37,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042958129] [2019-11-20 04:50:37,957 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 04:50:37,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:50:37,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 04:50:37,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 04:50:37,958 INFO L87 Difference]: Start difference. First operand 226 states and 240 transitions. Second operand 3 states. [2019-11-20 04:50:38,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:38,296 INFO L93 Difference]: Finished difference Result 224 states and 238 transitions. [2019-11-20 04:50:38,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 04:50:38,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-11-20 04:50:38,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:38,298 INFO L225 Difference]: With dead ends: 224 [2019-11-20 04:50:38,299 INFO L226 Difference]: Without dead ends: 224 [2019-11-20 04:50:38,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 04:50:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-11-20 04:50:38,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2019-11-20 04:50:38,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2019-11-20 04:50:38,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 238 transitions. [2019-11-20 04:50:38,316 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 238 transitions. Word has length 14 [2019-11-20 04:50:38,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:38,316 INFO L462 AbstractCegarLoop]: Abstraction has 224 states and 238 transitions. [2019-11-20 04:50:38,316 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 04:50:38,317 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 238 transitions. [2019-11-20 04:50:38,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 04:50:38,317 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:38,317 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:50:38,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:50:38,518 INFO L410 AbstractCegarLoop]: === Iteration 3 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 04:50:38,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:38,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1404157797, now seen corresponding path program 1 times [2019-11-20 04:50:38,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:50:38,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1617079601] [2019-11-20 04:50:38,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/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 04:50:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:38,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 04:50:38,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:38,764 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 04:50:38,765 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:50:38,777 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:50:38,777 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:50:38,778 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 04:50:38,786 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 04:50:38,786 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:50:38,832 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 04:50:38,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1617079601] [2019-11-20 04:50:38,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:50:38,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 04:50:38,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268423065] [2019-11-20 04:50:38,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 04:50:38,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:50:38,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 04:50:38,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 04:50:38,834 INFO L87 Difference]: Start difference. First operand 224 states and 238 transitions. Second operand 4 states. [2019-11-20 04:50:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:39,423 INFO L93 Difference]: Finished difference Result 222 states and 236 transitions. [2019-11-20 04:50:39,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 04:50:39,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-11-20 04:50:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:39,425 INFO L225 Difference]: With dead ends: 222 [2019-11-20 04:50:39,425 INFO L226 Difference]: Without dead ends: 222 [2019-11-20 04:50:39,426 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 04:50:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2019-11-20 04:50:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2019-11-20 04:50:39,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2019-11-20 04:50:39,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 236 transitions. [2019-11-20 04:50:39,440 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 236 transitions. Word has length 14 [2019-11-20 04:50:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:39,440 INFO L462 AbstractCegarLoop]: Abstraction has 222 states and 236 transitions. [2019-11-20 04:50:39,440 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 04:50:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 236 transitions. [2019-11-20 04:50:39,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 04:50:39,441 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:39,441 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:50:39,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:50:39,645 INFO L410 AbstractCegarLoop]: === Iteration 4 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 04:50:39,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:39,646 INFO L82 PathProgramCache]: Analyzing trace with hash 576649219, now seen corresponding path program 1 times [2019-11-20 04:50:39,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:50:39,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1312000672] [2019-11-20 04:50:39,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/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 04:50:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:39,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 04:50:39,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:39,890 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 04:50:39,890 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:50:39,892 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:50:39,893 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:50:39,893 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 04:50:39,983 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 04:50:40,007 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:50:40,008 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 25 [2019-11-20 04:50:40,010 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:50:40,030 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 04:50:40,031 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 04:50:40,031 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:11 [2019-11-20 04:50:40,045 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 04:50:40,045 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:50:40,196 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 04:50:40,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1312000672] [2019-11-20 04:50:40,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:50:40,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 9 [2019-11-20 04:50:40,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102199389] [2019-11-20 04:50:40,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 04:50:40,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:50:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:50:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:50:40,199 INFO L87 Difference]: Start difference. First operand 222 states and 236 transitions. Second operand 10 states. [2019-11-20 04:50:49,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:50:49,805 INFO L93 Difference]: Finished difference Result 251 states and 269 transitions. [2019-11-20 04:50:49,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 04:50:49,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-11-20 04:50:49,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:50:49,810 INFO L225 Difference]: With dead ends: 251 [2019-11-20 04:50:49,810 INFO L226 Difference]: Without dead ends: 251 [2019-11-20 04:50:49,811 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2019-11-20 04:50:49,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-11-20 04:50:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 229. [2019-11-20 04:50:49,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-11-20 04:50:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 248 transitions. [2019-11-20 04:50:49,825 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 248 transitions. Word has length 20 [2019-11-20 04:50:49,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:50:49,825 INFO L462 AbstractCegarLoop]: Abstraction has 229 states and 248 transitions. [2019-11-20 04:50:49,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 04:50:49,826 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 248 transitions. [2019-11-20 04:50:49,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 04:50:49,826 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:50:49,827 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:50:50,029 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:50:50,029 INFO L410 AbstractCegarLoop]: === Iteration 5 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 04:50:50,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:50:50,030 INFO L82 PathProgramCache]: Analyzing trace with hash 576649220, now seen corresponding path program 1 times [2019-11-20 04:50:50,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:50:50,030 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [362712236] [2019-11-20 04:50:50,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/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 04:50:50,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:50:50,276 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 04:50:50,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:50:50,286 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 04:50:50,287 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:50:50,296 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:50:50,300 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 04:50:50,300 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 04:50:50,308 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:50:50,309 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:50:50,309 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 04:50:50,443 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:50:50,445 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2019-11-20 04:50:50,446 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:50:50,465 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:50:50,468 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 04:50:50,469 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 04:50:50,470 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 04:50:50,476 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:50:50,477 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 04:50:50,477 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:14 [2019-11-20 04:50:50,523 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 04:50:50,523 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:50:50,612 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 04:50:50,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:50,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:50,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 04:50:50,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 04:50:50,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:50,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 04:50:50,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 04:50:54,627 WARN L191 SmtUtils]: Spent 1.28 s on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2019-11-20 04:50:54,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:50:55,023 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2019-11-20 04:50:55,326 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 04:50:55,328 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [362712236] [2019-11-20 04:50:55,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:50:55,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2019-11-20 04:50:55,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353415594] [2019-11-20 04:50:55,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 04:50:55,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:50:55,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 04:50:55,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=148, Unknown=1, NotChecked=0, Total=182 [2019-11-20 04:50:55,333 INFO L87 Difference]: Start difference. First operand 229 states and 248 transitions. Second operand 14 states. [2019-11-20 04:51:00,990 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_chain_node_~ppnode.offset_BEFORE_CALL_2 (_ BitVec 32)) (|v_alloc_node_#t~malloc2.base_11| (_ BitVec 32)) (v_chain_node_~ppnode.base_BEFORE_CALL_4 (_ BitVec 32))) (let ((.cse0 (bvadd v_chain_node_~ppnode.offset_BEFORE_CALL_2 (_ bv4 32)))) (or (not (= (select |c_#valid| |v_alloc_node_#t~malloc2.base_11|) (_ bv0 1))) (exists ((v_prenex_1 (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| v_prenex_1)) (not (bvsle (bvadd v_chain_node_~ppnode.offset_BEFORE_CALL_2 (_ bv4 32)) (select (store |c_old(#length)| v_prenex_1 (_ bv8 32)) v_chain_node_~ppnode.base_BEFORE_CALL_4))))) (bvsle .cse0 (select (store |c_#length| |v_alloc_node_#t~malloc2.base_11| (_ bv8 32)) v_chain_node_~ppnode.base_BEFORE_CALL_4)) (not (bvsle (_ bv0 32) v_chain_node_~ppnode.offset_BEFORE_CALL_2)) (not (bvsle v_chain_node_~ppnode.offset_BEFORE_CALL_2 .cse0))))) (exists ((|alloc_node_#t~malloc2.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |alloc_node_#t~malloc2.base|)) (= |c_#length| (store |c_old(#length)| |alloc_node_#t~malloc2.base| (_ bv8 32)))))) is different from false [2019-11-20 04:51:03,178 WARN L838 $PredicateComparison]: unable to prove that (and (or (bvsle (_ bv0 32) |c_chain_node_#in~ppnode.offset|) (forall ((|v_alloc_node_#t~malloc2.base_10| (_ BitVec 32))) (not (= (select |c_#valid| |v_alloc_node_#t~malloc2.base_10|) (_ bv0 1))))) (exists ((|alloc_node_#t~malloc2.base| (_ BitVec 32))) (= (_ bv8 32) (select |c_#length| |alloc_node_#t~malloc2.base|))) (forall ((v_prenex_4 (_ BitVec 32))) (or (not (= (select |c_#valid| v_prenex_4) (_ bv0 1))) (bvsle (bvadd |c_chain_node_#in~ppnode.offset| (_ bv4 32)) (select (store |c_#length| v_prenex_4 (_ bv8 32)) |c_chain_node_#in~ppnode.base|)))) (or (forall ((v_prenex_3 (_ BitVec 32))) (not (= (select |c_#valid| v_prenex_3) (_ bv0 1)))) (bvsle |c_chain_node_#in~ppnode.offset| (bvadd |c_chain_node_#in~ppnode.offset| (_ bv4 32)))) (exists ((|alloc_node_#t~malloc2.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |alloc_node_#t~malloc2.base|)) (= |c_#length| (store |c_old(#length)| |alloc_node_#t~malloc2.base| (_ bv8 32))))) (= (_ bv0 32) c_chain_node_~ppnode.offset) (= (_ bv4 32) (select |c_#length| c_chain_node_~ppnode.base))) is different from false [2019-11-20 04:51:10,689 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2019-11-20 04:51:19,103 WARN L191 SmtUtils]: Spent 8.13 s on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-11-20 04:51:36,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:51:36,148 INFO L93 Difference]: Finished difference Result 244 states and 264 transitions. [2019-11-20 04:51:36,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 04:51:36,149 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 20 [2019-11-20 04:51:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:51:36,151 INFO L225 Difference]: With dead ends: 244 [2019-11-20 04:51:36,151 INFO L226 Difference]: Without dead ends: 244 [2019-11-20 04:51:36,152 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=86, Invalid=339, Unknown=3, NotChecked=78, Total=506 [2019-11-20 04:51:36,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-11-20 04:51:36,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2019-11-20 04:51:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2019-11-20 04:51:36,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 264 transitions. [2019-11-20 04:51:36,162 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 264 transitions. Word has length 20 [2019-11-20 04:51:36,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:51:36,163 INFO L462 AbstractCegarLoop]: Abstraction has 242 states and 264 transitions. [2019-11-20 04:51:36,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 04:51:36,163 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 264 transitions. [2019-11-20 04:51:36,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 04:51:36,164 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:51:36,164 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:51:36,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:51:36,367 INFO L410 AbstractCegarLoop]: === Iteration 6 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 04:51:36,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:51:36,367 INFO L82 PathProgramCache]: Analyzing trace with hash 696256979, now seen corresponding path program 1 times [2019-11-20 04:51:36,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:51:36,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1677429068] [2019-11-20 04:51:36,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/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 04:51:36,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:51:36,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 04:51:36,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:51:36,577 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 04:51:36,577 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:51:36,579 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:51:36,579 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:51:36,579 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 04:51:36,603 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 04:51:36,603 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:51:36,668 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 04:51:36,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1677429068] [2019-11-20 04:51:36,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:51:36,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 04:51:36,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612904493] [2019-11-20 04:51:36,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 04:51:36,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:51:36,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 04:51:36,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 04:51:36,670 INFO L87 Difference]: Start difference. First operand 242 states and 264 transitions. Second operand 6 states. [2019-11-20 04:51:37,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:51:37,123 INFO L93 Difference]: Finished difference Result 241 states and 261 transitions. [2019-11-20 04:51:37,123 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 04:51:37,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-11-20 04:51:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:51:37,125 INFO L225 Difference]: With dead ends: 241 [2019-11-20 04:51:37,126 INFO L226 Difference]: Without dead ends: 241 [2019-11-20 04:51:37,126 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-20 04:51:37,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2019-11-20 04:51:37,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2019-11-20 04:51:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2019-11-20 04:51:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 261 transitions. [2019-11-20 04:51:37,135 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 261 transitions. Word has length 21 [2019-11-20 04:51:37,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:51:37,135 INFO L462 AbstractCegarLoop]: Abstraction has 241 states and 261 transitions. [2019-11-20 04:51:37,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 04:51:37,135 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 261 transitions. [2019-11-20 04:51:37,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 04:51:37,136 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:51:37,136 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:51:37,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:51:37,337 INFO L410 AbstractCegarLoop]: === Iteration 7 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 04:51:37,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:51:37,337 INFO L82 PathProgramCache]: Analyzing trace with hash 696256980, now seen corresponding path program 1 times [2019-11-20 04:51:37,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:51:37,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1101076839] [2019-11-20 04:51:37,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/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 04:51:37,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:51:37,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 04:51:37,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:51:37,544 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 04:51:37,545 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:51:37,549 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:51:37,549 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:51:37,550 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 04:51:37,600 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 04:51:37,600 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:51:37,847 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 04:51:37,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1101076839] [2019-11-20 04:51:37,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:51:37,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 04:51:37,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835969779] [2019-11-20 04:51:37,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 04:51:37,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:51:37,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:51:37,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:51:37,849 INFO L87 Difference]: Start difference. First operand 241 states and 261 transitions. Second operand 10 states. [2019-11-20 04:51:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:51:39,385 INFO L93 Difference]: Finished difference Result 240 states and 258 transitions. [2019-11-20 04:51:39,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 04:51:39,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-20 04:51:39,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:51:39,388 INFO L225 Difference]: With dead ends: 240 [2019-11-20 04:51:39,388 INFO L226 Difference]: Without dead ends: 240 [2019-11-20 04:51:39,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 04:51:39,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2019-11-20 04:51:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2019-11-20 04:51:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2019-11-20 04:51:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 258 transitions. [2019-11-20 04:51:39,396 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 258 transitions. Word has length 21 [2019-11-20 04:51:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:51:39,397 INFO L462 AbstractCegarLoop]: Abstraction has 240 states and 258 transitions. [2019-11-20 04:51:39,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 04:51:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 258 transitions. [2019-11-20 04:51:39,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 04:51:39,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:51:39,398 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:51:39,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:51:39,598 INFO L410 AbstractCegarLoop]: === Iteration 8 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 04:51:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:51:39,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1412322149, now seen corresponding path program 1 times [2019-11-20 04:51:39,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:51:39,600 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1104508798] [2019-11-20 04:51:39,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:51:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:51:39,783 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 04:51:39,784 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:51:39,848 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 04:51:39,848 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:51:40,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 04:51:40,025 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2019-11-20 04:51:40,026 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 04:51:40,036 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-11-20 04:51:40,036 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 04:51:40,061 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:51:40,061 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-20 04:51:40,061 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2019-11-20 04:51:40,177 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:51:40,177 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2019-11-20 04:51:40,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:51:40,178 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:51:40,179 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 04:51:40,212 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:51:40,212 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:51:40,213 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 04:51:40,213 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:30 [2019-11-20 04:51:40,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:51:40,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:51:40,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:51:40,484 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:51:40,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:51:40,683 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 04:51:40,825 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 04:51:40,825 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1104508798] [2019-11-20 04:51:40,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 04:51:40,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 04:51:40,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825483767] [2019-11-20 04:51:40,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 04:51:40,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 04:51:40,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 04:51:40,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-20 04:51:40,827 INFO L87 Difference]: Start difference. First operand 240 states and 258 transitions. Second operand 10 states. [2019-11-20 04:51:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 04:51:41,689 INFO L93 Difference]: Finished difference Result 237 states and 255 transitions. [2019-11-20 04:51:41,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 04:51:41,690 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-20 04:51:41,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 04:51:41,692 INFO L225 Difference]: With dead ends: 237 [2019-11-20 04:51:41,692 INFO L226 Difference]: Without dead ends: 237 [2019-11-20 04:51:41,692 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-11-20 04:51:41,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-11-20 04:51:41,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2019-11-20 04:51:41,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2019-11-20 04:51:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 255 transitions. [2019-11-20 04:51:41,700 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 255 transitions. Word has length 27 [2019-11-20 04:51:41,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 04:51:41,701 INFO L462 AbstractCegarLoop]: Abstraction has 237 states and 255 transitions. [2019-11-20 04:51:41,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 04:51:41,701 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 255 transitions. [2019-11-20 04:51:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 04:51:41,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 04:51:41,702 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 04:51:41,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:51:41,909 INFO L410 AbstractCegarLoop]: === Iteration 9 === [create_sllErr7REQUIRES_VIOLATION, create_sllErr1REQUIRES_VIOLATION, create_sllErr6REQUIRES_VIOLATION, create_sllErr0REQUIRES_VIOLATION, create_sllErr5REQUIRES_VIOLATION, create_sllErr4REQUIRES_VIOLATION, create_sllErr9REQUIRES_VIOLATION, create_sllErr3REQUIRES_VIOLATION, create_sllErr8REQUIRES_VIOLATION, create_sllErr2REQUIRES_VIOLATION, reverse_dllErr7REQUIRES_VIOLATION, reverse_dllErr1REQUIRES_VIOLATION, reverse_dllErr6REQUIRES_VIOLATION, reverse_dllErr0REQUIRES_VIOLATION, reverse_dllErr5REQUIRES_VIOLATION, reverse_dllErr4REQUIRES_VIOLATION, reverse_dllErr3REQUIRES_VIOLATION, reverse_dllErr2REQUIRES_VIOLATION, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION, check_seq_nextErr3REQUIRES_VIOLATION, init_back_linkErr1REQUIRES_VIOLATION, init_back_linkErr0REQUIRES_VIOLATION, init_back_linkErr3REQUIRES_VIOLATION, init_back_linkErr2REQUIRES_VIOLATION, check_seq_prevErr2REQUIRES_VIOLATION, check_seq_prevErr3REQUIRES_VIOLATION, check_seq_prevErr0REQUIRES_VIOLATION, check_seq_prevErr1REQUIRES_VIOLATION, chain_nodeErr1REQUIRES_VIOLATION, chain_nodeErr0REQUIRES_VIOLATION, chain_nodeErr5REQUIRES_VIOLATION, chain_nodeErr4REQUIRES_VIOLATION, chain_nodeErr3REQUIRES_VIOLATION, chain_nodeErr2REQUIRES_VIOLATION, remove_fw_linkErr3REQUIRES_VIOLATION, remove_fw_linkErr2REQUIRES_VIOLATION, remove_fw_linkErr1REQUIRES_VIOLATION, remove_fw_linkErr0REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr29REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr31REQUIRES_VIOLATION, mainErr30REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr27REQUIRES_VIOLATION, mainErr26REQUIRES_VIOLATION, mainErr28REQUIRES_VIOLATION, mainErr35ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr24REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr25REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr21REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr23REQUIRES_VIOLATION, mainErr22REQUIRES_VIOLATION, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr20REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr34ASSERT_VIOLATIONMEMORY_FREE, mainErr17REQUIRES_VIOLATION, mainErr36ASSERT_VIOLATIONMEMORY_FREE, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr32REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr37ENSURES_VIOLATIONMEMORY_LEAK, mainErr33REQUIRES_VIOLATION, alloc_nodeErr1REQUIRES_VIOLATION, alloc_nodeErr0REQUIRES_VIOLATION, alloc_nodeErr2REQUIRES_VIOLATION, alloc_nodeErr3REQUIRES_VIOLATION]=== [2019-11-20 04:51:41,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 04:51:41,910 INFO L82 PathProgramCache]: Analyzing trace with hash 832313954, now seen corresponding path program 1 times [2019-11-20 04:51:41,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 04:51:41,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1721435073] [2019-11-20 04:51:41,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d2cbde83-06cd-490f-9fb4-6174712368d8/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:51:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 04:51:42,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 04:51:42,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 04:51:42,137 INFO L343 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2019-11-20 04:51:42,138 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2019-11-20 04:51:42,138 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:51:42,142 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:51:42,142 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 04:51:42,142 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2019-11-20 04:51:42,175 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:51:42,176 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2019-11-20 04:51:42,176 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:51:42,200 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 04:51:42,201 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 04:51:42,201 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:11 [2019-11-20 04:51:42,342 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 04:51:42,362 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 04:51:42,363 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 50 [2019-11-20 04:51:42,363 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 04:51:42,394 INFO L567 ElimStorePlain]: treesize reduction 23, result has 41.0 percent of original size [2019-11-20 04:51:42,395 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 04:51:42,395 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2019-11-20 04:51:42,429 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 04:51:42,429 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 04:51:43,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 04:51:43,040 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 04:51:43,043 INFO L168 Benchmark]: Toolchain (without parser) took 68096.10 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 316.7 MB). Free memory was 946.0 MB in the beginning and 1.2 GB in the end (delta: -230.3 MB). Peak memory consumption was 86.3 MB. Max. memory is 11.5 GB. [2019-11-20 04:51:43,044 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 04:51:43,044 INFO L168 Benchmark]: CACSL2BoogieTranslator took 546.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -172.7 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-20 04:51:43,045 INFO L168 Benchmark]: Boogie Preprocessor took 107.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. [2019-11-20 04:51:43,045 INFO L168 Benchmark]: RCFGBuilder took 1270.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 92.9 MB). Peak memory consumption was 92.9 MB. Max. memory is 11.5 GB. [2019-11-20 04:51:43,046 INFO L168 Benchmark]: TraceAbstraction took 66168.79 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 168.3 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -157.2 MB). Peak memory consumption was 11.1 MB. Max. memory is 11.5 GB. [2019-11-20 04:51:43,048 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 546.82 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 946.0 MB in the beginning and 1.1 GB in the end (delta: -172.7 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 107.25 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: 6.6 MB). Peak memory consumption was 6.6 MB. Max. memory is 11.5 GB. * RCFGBuilder took 1270.08 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 92.9 MB). Peak memory consumption was 92.9 MB. Max. memory is 11.5 GB. * TraceAbstraction took 66168.79 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 168.3 MB). Free memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: -157.2 MB). Peak memory consumption was 11.1 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...