./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple-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_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/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 17ff5ae56efea2deac29e7fa779d53a24810a7c7 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 00:47:14,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 00:47:14,511 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 00:47:14,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 00:47:14,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 00:47:14,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 00:47:14,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 00:47:14,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 00:47:14,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 00:47:14,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 00:47:14,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 00:47:14,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 00:47:14,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 00:47:14,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 00:47:14,538 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 00:47:14,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 00:47:14,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 00:47:14,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 00:47:14,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 00:47:14,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 00:47:14,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 00:47:14,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 00:47:14,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 00:47:14,567 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 00:47:14,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 00:47:14,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 00:47:14,572 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 00:47:14,574 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 00:47:14,574 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 00:47:14,577 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 00:47:14,577 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 00:47:14,578 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 00:47:14,578 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 00:47:14,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 00:47:14,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 00:47:14,581 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 00:47:14,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 00:47:14,582 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 00:47:14,582 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 00:47:14,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 00:47:14,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 00:47:14,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 00:47:14,606 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 00:47:14,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 00:47:14,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 00:47:14,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 00:47:14,609 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 00:47:14,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 00:47:14,609 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 00:47:14,610 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 00:47:14,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 00:47:14,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 00:47:14,611 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 00:47:14,612 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 00:47:14,612 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 00:47:14,612 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 00:47:14,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 00:47:14,613 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 00:47:14,613 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 00:47:14,613 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 00:47:14,613 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 00:47:14,614 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 00:47:14,614 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 00:47:14,614 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 00:47:14,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 00:47:14,615 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 00:47:14,615 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 00:47:14,615 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 00:47:14,616 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 00:47:14,616 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 00:47:14,616 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 00:47:14,616 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_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/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 -> 17ff5ae56efea2deac29e7fa779d53a24810a7c7 [2019-11-20 00:47:14,795 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 00:47:14,810 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 00:47:14,814 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 00:47:14,815 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 00:47:14,816 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 00:47:14,817 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/bin/uautomizer/../../sv-benchmarks/c/list-properties/simple-2.i [2019-11-20 00:47:14,897 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/bin/uautomizer/data/8166741d8/d7eac484635d422da3e3d1bdf2dce98c/FLAG7700673d8 [2019-11-20 00:47:15,388 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 00:47:15,389 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/sv-benchmarks/c/list-properties/simple-2.i [2019-11-20 00:47:15,406 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/bin/uautomizer/data/8166741d8/d7eac484635d422da3e3d1bdf2dce98c/FLAG7700673d8 [2019-11-20 00:47:15,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/bin/uautomizer/data/8166741d8/d7eac484635d422da3e3d1bdf2dce98c [2019-11-20 00:47:15,747 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 00:47:15,749 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 00:47:15,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 00:47:15,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 00:47:15,754 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 00:47:15,755 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:47:15" (1/1) ... [2019-11-20 00:47:15,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58893178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:15, skipping insertion in model container [2019-11-20 00:47:15,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:47:15" (1/1) ... [2019-11-20 00:47:15,767 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 00:47:15,817 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 00:47:16,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:47:16,349 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 00:47:16,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 00:47:16,452 INFO L192 MainTranslator]: Completed translation [2019-11-20 00:47:16,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:16 WrapperNode [2019-11-20 00:47:16,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 00:47:16,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 00:47:16,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 00:47:16,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 00:47:16,469 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:16" (1/1) ... [2019-11-20 00:47:16,469 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:16" (1/1) ... [2019-11-20 00:47:16,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:16" (1/1) ... [2019-11-20 00:47:16,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:16" (1/1) ... [2019-11-20 00:47:16,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:16" (1/1) ... [2019-11-20 00:47:16,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:16" (1/1) ... [2019-11-20 00:47:16,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:16" (1/1) ... [2019-11-20 00:47:16,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 00:47:16,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 00:47:16,527 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 00:47:16,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 00:47:16,528 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/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 00:47:16,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 00:47:16,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 00:47:16,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 00:47:16,592 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 00:47:16,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 00:47:16,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 00:47:16,593 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 00:47:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 00:47:16,594 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 00:47:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 00:47:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 00:47:16,594 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 00:47:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 00:47:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 00:47:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 00:47:16,595 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 00:47:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 00:47:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 00:47:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 00:47:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 00:47:16,596 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 00:47:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 00:47:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 00:47:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 00:47:16,597 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 00:47:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 00:47:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 00:47:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 00:47:16,598 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 00:47:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 00:47:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 00:47:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 00:47:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 00:47:16,599 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 00:47:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 00:47:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 00:47:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 00:47:16,600 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 00:47:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 00:47:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 00:47:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 00:47:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 00:47:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 00:47:16,601 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 00:47:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 00:47:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 00:47:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 00:47:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 00:47:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 00:47:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 00:47:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 00:47:16,602 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 00:47:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 00:47:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 00:47:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 00:47:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 00:47:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 00:47:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 00:47:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 00:47:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 00:47:16,603 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 00:47:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 00:47:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 00:47:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 00:47:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 00:47:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 00:47:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 00:47:16,604 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 00:47:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 00:47:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 00:47:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 00:47:16,605 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 00:47:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 00:47:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 00:47:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 00:47:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 00:47:16,606 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 00:47:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 00:47:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 00:47:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 00:47:16,607 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 00:47:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 00:47:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 00:47:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 00:47:16,608 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 00:47:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 00:47:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 00:47:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 00:47:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 00:47:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 00:47:16,609 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 00:47:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 00:47:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 00:47:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 00:47:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 00:47:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 00:47:16,610 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 00:47:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 00:47:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 00:47:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 00:47:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 00:47:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 00:47:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 00:47:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 00:47:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 00:47:16,611 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 00:47:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 00:47:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 00:47:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 00:47:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 00:47:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 00:47:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 00:47:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 00:47:16,612 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 00:47:16,613 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 00:47:16,613 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 00:47:16,613 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 00:47:16,613 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 00:47:16,613 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 00:47:16,614 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 00:47:16,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 00:47:16,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 00:47:16,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 00:47:16,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 00:47:16,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 00:47:16,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 00:47:16,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 00:47:16,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 00:47:16,976 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 00:47:17,303 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 00:47:17,303 INFO L285 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-20 00:47:17,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:47:17 BoogieIcfgContainer [2019-11-20 00:47:17,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 00:47:17,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 00:47:17,306 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 00:47:17,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 00:47:17,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:47:15" (1/3) ... [2019-11-20 00:47:17,314 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14540b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:47:17, skipping insertion in model container [2019-11-20 00:47:17,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:47:16" (2/3) ... [2019-11-20 00:47:17,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14540b63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:47:17, skipping insertion in model container [2019-11-20 00:47:17,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:47:17" (3/3) ... [2019-11-20 00:47:17,319 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-2.i [2019-11-20 00:47:17,329 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 00:47:17,345 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 15 error locations. [2019-11-20 00:47:17,358 INFO L249 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2019-11-20 00:47:17,380 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 00:47:17,380 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 00:47:17,380 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 00:47:17,380 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 00:47:17,381 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 00:47:17,381 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 00:47:17,381 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 00:47:17,381 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 00:47:17,397 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2019-11-20 00:47:17,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 00:47:17,408 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:17,408 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:17,409 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 00:47:17,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:17,416 INFO L82 PathProgramCache]: Analyzing trace with hash -860382195, now seen corresponding path program 1 times [2019-11-20 00:47:17,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:17,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1329836847] [2019-11-20 00:47:17,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/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 00:47:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:47:17,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-20 00:47:17,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:17,673 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 00:47:17,674 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:17,690 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 00:47:17,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1329836847] [2019-11-20 00:47:17,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:47:17,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 00:47:17,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39766770] [2019-11-20 00:47:17,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-20 00:47:17,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:17,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-20 00:47:17,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-20 00:47:17,717 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 2 states. [2019-11-20 00:47:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:17,738 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2019-11-20 00:47:17,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 00:47:17,739 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-20 00:47:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:17,748 INFO L225 Difference]: With dead ends: 48 [2019-11-20 00:47:17,748 INFO L226 Difference]: Without dead ends: 40 [2019-11-20 00:47:17,750 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 00:47:17,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-20 00:47:17,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-20 00:47:17,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-20 00:47:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2019-11-20 00:47:17,789 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 10 [2019-11-20 00:47:17,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:17,790 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2019-11-20 00:47:17,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-20 00:47:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2019-11-20 00:47:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 00:47:17,791 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:17,791 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:18,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:18,011 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 00:47:18,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:18,011 INFO L82 PathProgramCache]: Analyzing trace with hash -860382877, now seen corresponding path program 1 times [2019-11-20 00:47:18,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:18,012 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [135267857] [2019-11-20 00:47:18,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/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 00:47:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:47:18,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 00:47:18,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:18,280 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 00:47:18,281 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:18,285 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:18,286 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:18,286 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 00:47:18,302 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 00:47:18,302 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:18,313 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 00:47:18,313 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135267857] [2019-11-20 00:47:18,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:47:18,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 00:47:18,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656696357] [2019-11-20 00:47:18,318 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 00:47:18,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:18,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 00:47:18,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 00:47:18,320 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 4 states. [2019-11-20 00:47:18,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:18,581 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2019-11-20 00:47:18,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 00:47:18,581 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-20 00:47:18,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:18,583 INFO L225 Difference]: With dead ends: 47 [2019-11-20 00:47:18,583 INFO L226 Difference]: Without dead ends: 47 [2019-11-20 00:47:18,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 00:47:18,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-20 00:47:18,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2019-11-20 00:47:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-20 00:47:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-11-20 00:47:18,591 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 10 [2019-11-20 00:47:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:18,592 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-11-20 00:47:18,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 00:47:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-11-20 00:47:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 00:47:18,593 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:18,593 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:18,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:18,794 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 00:47:18,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:18,794 INFO L82 PathProgramCache]: Analyzing trace with hash -860382876, now seen corresponding path program 1 times [2019-11-20 00:47:18,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:18,795 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1519520145] [2019-11-20 00:47:18,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/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 00:47:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:47:19,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 00:47:19,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:19,038 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 00:47:19,039 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:19,046 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:19,047 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:19,047 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 00:47:19,074 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 00:47:19,074 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:19,174 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 00:47:19,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1519520145] [2019-11-20 00:47:19,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:47:19,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 00:47:19,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849868209] [2019-11-20 00:47:19,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 00:47:19,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:19,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 00:47:19,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 00:47:19,176 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2019-11-20 00:47:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:19,634 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2019-11-20 00:47:19,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 00:47:19,635 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-20 00:47:19,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:19,637 INFO L225 Difference]: With dead ends: 54 [2019-11-20 00:47:19,637 INFO L226 Difference]: Without dead ends: 54 [2019-11-20 00:47:19,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-20 00:47:19,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-20 00:47:19,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2019-11-20 00:47:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-20 00:47:19,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2019-11-20 00:47:19,656 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 10 [2019-11-20 00:47:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:19,657 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2019-11-20 00:47:19,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 00:47:19,658 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2019-11-20 00:47:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 00:47:19,660 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:19,661 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:19,863 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:19,864 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 00:47:19,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:19,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1300061406, now seen corresponding path program 1 times [2019-11-20 00:47:19,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:19,865 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [850101687] [2019-11-20 00:47:19,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/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 00:47:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:47:20,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 00:47:20,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:20,075 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 00:47:20,075 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:20,085 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 00:47:20,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [850101687] [2019-11-20 00:47:20,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:47:20,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-20 00:47:20,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518104792] [2019-11-20 00:47:20,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 00:47:20,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:20,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 00:47:20,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 00:47:20,088 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 4 states. [2019-11-20 00:47:20,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:20,274 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2019-11-20 00:47:20,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 00:47:20,275 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-20 00:47:20,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:20,276 INFO L225 Difference]: With dead ends: 51 [2019-11-20 00:47:20,276 INFO L226 Difference]: Without dead ends: 51 [2019-11-20 00:47:20,276 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 00:47:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-20 00:47:20,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-11-20 00:47:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-20 00:47:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2019-11-20 00:47:20,282 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 15 [2019-11-20 00:47:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:20,283 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2019-11-20 00:47:20,283 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 00:47:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2019-11-20 00:47:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 00:47:20,284 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:20,284 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:20,488 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:20,488 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 00:47:20,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:20,489 INFO L82 PathProgramCache]: Analyzing trace with hash 263742261, now seen corresponding path program 1 times [2019-11-20 00:47:20,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:20,490 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1835722257] [2019-11-20 00:47:20,490 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/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 00:47:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:47:20,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 00:47:20,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:20,746 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:20,746 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 12 treesize of output 28 [2019-11-20 00:47:20,747 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:20,774 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 00:47:20,774 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:20,775 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:11 [2019-11-20 00:47:20,798 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-20 00:47:20,799 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:20,819 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:20,821 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:20,821 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:17 [2019-11-20 00:47:20,850 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 9 [2019-11-20 00:47:20,851 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:20,867 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:20,868 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 00:47:20,868 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:26, output treesize:11 [2019-11-20 00:47:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:20,909 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:20,959 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1835722257] [2019-11-20 00:47:20,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:47:20,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-20 00:47:20,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320510619] [2019-11-20 00:47:20,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 00:47:20,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:20,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 00:47:20,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 00:47:20,961 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 8 states. [2019-11-20 00:47:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:21,488 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2019-11-20 00:47:21,489 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 00:47:21,489 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2019-11-20 00:47:21,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:21,491 INFO L225 Difference]: With dead ends: 62 [2019-11-20 00:47:21,491 INFO L226 Difference]: Without dead ends: 62 [2019-11-20 00:47:21,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-20 00:47:21,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-20 00:47:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2019-11-20 00:47:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-20 00:47:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2019-11-20 00:47:21,503 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 17 [2019-11-20 00:47:21,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:21,503 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2019-11-20 00:47:21,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 00:47:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2019-11-20 00:47:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 00:47:21,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:21,504 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:21,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:21,705 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 00:47:21,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:21,706 INFO L82 PathProgramCache]: Analyzing trace with hash 263742262, now seen corresponding path program 1 times [2019-11-20 00:47:21,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:21,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1594236945] [2019-11-20 00:47:21,706 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/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 00:47:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:47:21,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 00:47:21,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:21,928 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 00:47:21,928 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:21,940 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:21,941 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:21,941 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 00:47:21,966 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-20 00:47:21,966 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:21,985 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:21,991 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-20 00:47:21,991 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:22,005 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:22,006 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:22,006 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2019-11-20 00:47:22,036 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 11 [2019-11-20 00:47:22,037 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:22,050 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:22,065 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2019-11-20 00:47:22,066 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:22,072 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:22,072 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:22,073 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:41, output treesize:11 [2019-11-20 00:47:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:22,109 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:22,389 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1594236945] [2019-11-20 00:47:22,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 00:47:22,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 00:47:22,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965184798] [2019-11-20 00:47:22,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 00:47:22,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:22,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 00:47:22,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 00:47:22,390 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 10 states. [2019-11-20 00:47:23,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:23,206 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2019-11-20 00:47:23,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 00:47:23,207 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-11-20 00:47:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:23,208 INFO L225 Difference]: With dead ends: 58 [2019-11-20 00:47:23,208 INFO L226 Difference]: Without dead ends: 58 [2019-11-20 00:47:23,209 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-11-20 00:47:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-20 00:47:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2019-11-20 00:47:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 00:47:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-11-20 00:47:23,213 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 17 [2019-11-20 00:47:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:23,213 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-11-20 00:47:23,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 00:47:23,214 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-11-20 00:47:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 00:47:23,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:23,215 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 00:47:23,415 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:23,415 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 00:47:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:23,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1371071444, now seen corresponding path program 1 times [2019-11-20 00:47:23,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:23,416 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1135649215] [2019-11-20 00:47:23,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/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 00:47:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 00:47:23,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 00:47:23,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 00:47:23,635 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-20 00:47:23,635 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:23,647 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:23,651 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 13 treesize of output 9 [2019-11-20 00:47:23,652 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:23,660 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:23,660 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:23,661 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2019-11-20 00:47:23,704 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2019-11-20 00:47:23,704 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:23,712 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:23,714 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2019-11-20 00:47:23,715 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 00:47:23,719 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 00:47:23,719 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 00:47:23,720 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2019-11-20 00:47:23,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:23,754 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 00:47:23,824 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 29 [2019-11-20 00:47:23,826 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2019-11-20 00:47:23,849 INFO L567 ElimStorePlain]: treesize reduction 19, result has 36.7 percent of original size [2019-11-20 00:47:23,849 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 00:47:23,850 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-20 00:47:23,850 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2019-11-20 00:47:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 00:47:23,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1135649215] [2019-11-20 00:47:23,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 00:47:23,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2019-11-20 00:47:23,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111778094] [2019-11-20 00:47:23,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 00:47:23,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 00:47:23,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 00:47:23,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-20 00:47:23,879 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2019-11-20 00:47:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 00:47:24,379 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2019-11-20 00:47:24,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 00:47:24,380 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2019-11-20 00:47:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 00:47:24,381 INFO L225 Difference]: With dead ends: 53 [2019-11-20 00:47:24,381 INFO L226 Difference]: Without dead ends: 53 [2019-11-20 00:47:24,381 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2019-11-20 00:47:24,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-20 00:47:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2019-11-20 00:47:24,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-20 00:47:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-11-20 00:47:24,386 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 19 [2019-11-20 00:47:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 00:47:24,386 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-11-20 00:47:24,386 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 00:47:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-11-20 00:47:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 00:47:24,387 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 00:47:24,388 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 00:47:24,590 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:24,591 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2019-11-20 00:47:24,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 00:47:24,591 INFO L82 PathProgramCache]: Analyzing trace with hash 446456889, now seen corresponding path program 1 times [2019-11-20 00:47:24,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 00:47:24,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1765558773] [2019-11-20 00:47:24,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6c2e5c10-d7f4-4c56-9c80-32cdc236c83f/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 00:47:24,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:47:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 00:47:24,927 INFO L174 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2019-11-20 00:47:24,928 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 00:47:25,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 00:47:25,146 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2019-11-20 00:47:25,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 12:47:25 BoogieIcfgContainer [2019-11-20 00:47:25,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 00:47:25,176 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 00:47:25,176 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 00:47:25,176 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 00:47:25,177 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:47:17" (3/4) ... [2019-11-20 00:47:25,180 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-20 00:47:25,180 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 00:47:25,182 INFO L168 Benchmark]: Toolchain (without parser) took 9433.46 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 157.8 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -206.5 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:47:25,183 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:47:25,186 INFO L168 Benchmark]: CACSL2BoogieTranslator took 703.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -164.2 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-20 00:47:25,191 INFO L168 Benchmark]: Boogie Preprocessor took 72.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 00:47:25,192 INFO L168 Benchmark]: RCFGBuilder took 778.12 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: 49.2 MB). Peak memory consumption was 49.2 MB. Max. memory is 11.5 GB. [2019-11-20 00:47:25,193 INFO L168 Benchmark]: TraceAbstraction took 7868.99 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.7 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -97.0 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:47:25,194 INFO L168 Benchmark]: Witness Printer took 5.01 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 00:47:25,196 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 703.65 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 121.1 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -164.2 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 72.60 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 778.12 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: 49.2 MB). Peak memory consumption was 49.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 7868.99 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 36.7 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -97.0 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 5.01 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 520]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 520. Possible FailurePath: [L521] List a = (List) malloc(sizeof(struct node)); VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}] [L522] COND FALSE !(a == 0) VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}] [L523] List t; [L524] List p = a; VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L525] COND FALSE !(__VERIFIER_nondet_int()) [L532] p->h = 1 VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L533] p->n = 0 VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L534] p = a VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L535] COND TRUE p!=0 VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}] [L536] EXPR p->h VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->h=1] [L536] COND FALSE !(p->h != 1) [L539] EXPR p->n VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={-2147483648:0}, p->n={0:0}] [L539] p = p->n [L535] COND FALSE !(p!=0) VAL [a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={0:0}] [L541] return 0; VAL [\result=0, a={-2147483648:0}, malloc(sizeof(struct node))={-2147483648:0}, p={0:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 64 locations, 15 error locations. Result: UNSAFE, OverallTime: 7.7s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 187 SDtfs, 302 SDslu, 336 SDs, 0 SdLazy, 544 SolverSat, 55 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 207 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 66 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 182 ConstructedInterpolants, 0 QuantifiedInterpolants, 13530 SizeOfPredicates, 42 NumberOfNonLiveVariables, 388 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 14 InterpolantComputations, 12 PerfectInterpolantSequences, 6/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...