./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.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_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/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 b812e7d14425eea3a24125f5e2db40eadfc6c14c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 05:32:04,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 05:32:04,609 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 05:32:04,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 05:32:04,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 05:32:04,621 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 05:32:04,622 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 05:32:04,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 05:32:04,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 05:32:04,627 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 05:32:04,628 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 05:32:04,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 05:32:04,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 05:32:04,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 05:32:04,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 05:32:04,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 05:32:04,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 05:32:04,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 05:32:04,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 05:32:04,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 05:32:04,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 05:32:04,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 05:32:04,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 05:32:04,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 05:32:04,644 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 05:32:04,644 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 05:32:04,644 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 05:32:04,645 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 05:32:04,645 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 05:32:04,646 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 05:32:04,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 05:32:04,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 05:32:04,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 05:32:04,648 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 05:32:04,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 05:32:04,649 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 05:32:04,650 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 05:32:04,650 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 05:32:04,650 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 05:32:04,651 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 05:32:04,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 05:32:04,658 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 05:32:04,671 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 05:32:04,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 05:32:04,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 05:32:04,674 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 05:32:04,674 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 05:32:04,674 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 05:32:04,674 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 05:32:04,674 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 05:32:04,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 05:32:04,675 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 05:32:04,676 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 05:32:04,676 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 05:32:04,676 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 05:32:04,676 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 05:32:04,676 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 05:32:04,677 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 05:32:04,677 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 05:32:04,677 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 05:32:04,677 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 05:32:04,677 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 05:32:04,678 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 05:32:04,678 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 05:32:04,678 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 05:32:04,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 05:32:04,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 05:32:04,679 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 05:32:04,679 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 05:32:04,679 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 05:32:04,679 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 05:32:04,679 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_b66f3703-9e34-4568-8cae-0691a3d5dbbe/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 -> b812e7d14425eea3a24125f5e2db40eadfc6c14c [2019-11-20 05:32:04,827 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 05:32:04,842 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 05:32:04,846 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 05:32:04,847 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 05:32:04,848 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 05:32:04,848 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/../../sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2019-11-20 05:32:04,905 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/data/5bf7f7a12/b34ad54274ff44a6856e743f5f46543a/FLAG8a8e074b5 [2019-11-20 05:32:05,486 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 05:32:05,487 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/sv-benchmarks/c/array-memsafety/openbsd_cstrlen-alloca-1.i [2019-11-20 05:32:05,511 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/data/5bf7f7a12/b34ad54274ff44a6856e743f5f46543a/FLAG8a8e074b5 [2019-11-20 05:32:05,781 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/data/5bf7f7a12/b34ad54274ff44a6856e743f5f46543a [2019-11-20 05:32:05,785 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 05:32:05,787 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 05:32:05,790 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 05:32:05,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 05:32:05,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 05:32:05,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:32:05" (1/1) ... [2019-11-20 05:32:05,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3440089a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:05, skipping insertion in model container [2019-11-20 05:32:05,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:32:05" (1/1) ... [2019-11-20 05:32:05,816 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 05:32:05,878 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 05:32:06,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 05:32:06,354 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 05:32:06,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 05:32:06,464 INFO L192 MainTranslator]: Completed translation [2019-11-20 05:32:06,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:06 WrapperNode [2019-11-20 05:32:06,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 05:32:06,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 05:32:06,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 05:32:06,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 05:32:06,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:06" (1/1) ... [2019-11-20 05:32:06,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:06" (1/1) ... [2019-11-20 05:32:06,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:06" (1/1) ... [2019-11-20 05:32:06,500 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:06" (1/1) ... [2019-11-20 05:32:06,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:06" (1/1) ... [2019-11-20 05:32:06,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:06" (1/1) ... [2019-11-20 05:32:06,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:06" (1/1) ... [2019-11-20 05:32:06,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 05:32:06,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 05:32:06,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 05:32:06,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 05:32:06,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/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 05:32:06,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 05:32:06,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 05:32:06,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 05:32:06,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 05:32:06,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 05:32:06,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 05:32:06,620 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 05:32:06,621 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrlen [2019-11-20 05:32:06,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 05:32:06,622 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 05:32:06,622 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 05:32:06,622 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 05:32:06,623 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 05:32:06,623 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 05:32:06,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 05:32:06,624 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 05:32:06,624 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 05:32:06,625 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 05:32:06,625 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 05:32:06,625 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 05:32:06,625 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 05:32:06,625 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 05:32:06,626 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 05:32:06,626 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 05:32:06,626 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 05:32:06,627 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 05:32:06,627 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 05:32:06,627 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 05:32:06,628 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 05:32:06,628 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 05:32:06,628 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 05:32:06,628 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 05:32:06,628 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 05:32:06,628 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 05:32:06,629 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 05:32:06,629 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 05:32:06,629 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 05:32:06,629 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 05:32:06,629 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 05:32:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 05:32:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 05:32:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 05:32:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 05:32:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 05:32:06,630 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 05:32:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 05:32:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 05:32:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 05:32:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 05:32:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 05:32:06,632 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 05:32:06,632 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 05:32:06,632 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 05:32:06,632 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 05:32:06,632 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 05:32:06,633 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 05:32:06,633 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 05:32:06,633 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 05:32:06,634 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 05:32:06,634 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 05:32:06,634 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 05:32:06,634 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 05:32:06,635 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 05:32:06,635 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 05:32:06,635 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 05:32:06,635 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 05:32:06,635 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 05:32:06,636 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 05:32:06,636 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 05:32:06,637 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 05:32:06,637 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 05:32:06,638 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 05:32:06,638 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 05:32:06,638 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 05:32:06,639 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 05:32:06,639 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 05:32:06,640 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 05:32:06,640 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 05:32:06,640 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 05:32:06,640 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 05:32:06,640 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 05:32:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 05:32:06,641 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 05:32:06,642 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 05:32:06,642 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 05:32:06,642 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 05:32:06,642 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 05:32:06,642 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 05:32:06,642 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 05:32:06,643 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 05:32:06,643 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 05:32:06,643 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 05:32:06,643 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 05:32:06,643 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 05:32:06,643 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 05:32:06,644 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 05:32:06,644 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 05:32:06,644 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 05:32:06,644 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 05:32:06,644 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 05:32:06,644 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 05:32:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 05:32:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 05:32:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 05:32:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 05:32:06,645 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 05:32:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 05:32:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 05:32:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 05:32:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 05:32:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 05:32:06,646 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 05:32:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 05:32:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 05:32:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 05:32:06,647 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 05:32:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 05:32:06,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-11-20 05:32:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure cstrlen [2019-11-20 05:32:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-20 05:32:06,649 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 05:32:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 05:32:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-20 05:32:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 05:32:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 05:32:06,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 05:32:07,335 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 05:32:07,335 INFO L285 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-20 05:32:07,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:32:07 BoogieIcfgContainer [2019-11-20 05:32:07,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 05:32:07,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 05:32:07,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 05:32:07,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 05:32:07,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:32:05" (1/3) ... [2019-11-20 05:32:07,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b43d53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:32:07, skipping insertion in model container [2019-11-20 05:32:07,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:32:06" (2/3) ... [2019-11-20 05:32:07,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b43d53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:32:07, skipping insertion in model container [2019-11-20 05:32:07,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:32:07" (3/3) ... [2019-11-20 05:32:07,345 INFO L109 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlen-alloca-1.i [2019-11-20 05:32:07,356 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 05:32:07,364 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2019-11-20 05:32:07,377 INFO L249 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2019-11-20 05:32:07,398 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 05:32:07,399 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 05:32:07,399 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 05:32:07,399 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 05:32:07,399 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 05:32:07,399 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 05:32:07,399 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 05:32:07,400 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 05:32:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-20 05:32:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 05:32:07,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:07,427 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:07,427 INFO L410 AbstractCegarLoop]: === Iteration 1 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:07,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2095006156, now seen corresponding path program 1 times [2019-11-20 05:32:07,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:07,447 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1626460137] [2019-11-20 05:32:07,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/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 05:32:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:07,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 05:32:07,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:07,868 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 05:32:07,868 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:07,881 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:07,881 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:07,881 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 05:32:07,892 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 05:32:07,893 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:07,909 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 05:32:07,910 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1626460137] [2019-11-20 05:32:07,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:07,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 05:32:07,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637671886] [2019-11-20 05:32:07,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 05:32:07,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:07,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 05:32:07,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:32:07,940 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2019-11-20 05:32:08,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:08,060 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2019-11-20 05:32:08,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 05:32:08,062 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-20 05:32:08,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:08,072 INFO L225 Difference]: With dead ends: 31 [2019-11-20 05:32:08,073 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 05:32:08,075 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:32:08,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 05:32:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-20 05:32:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-20 05:32:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-20 05:32:08,115 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 10 [2019-11-20 05:32:08,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:08,115 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-20 05:32:08,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 05:32:08,115 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-20 05:32:08,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 05:32:08,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:08,116 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:08,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:08,329 INFO L410 AbstractCegarLoop]: === Iteration 2 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:08,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:08,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2095006155, now seen corresponding path program 1 times [2019-11-20 05:32:08,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:08,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1933966850] [2019-11-20 05:32:08,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/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 05:32:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:08,544 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 05:32:08,545 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:08,565 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 05:32:08,566 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:08,578 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:08,579 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:08,579 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:14 [2019-11-20 05:32:08,598 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 05:32:08,599 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:08,796 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 05:32:08,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1933966850] [2019-11-20 05:32:08,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:08,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 05:32:08,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51294485] [2019-11-20 05:32:08,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 05:32:08,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:08,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 05:32:08,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:32:08,799 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2019-11-20 05:32:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:09,141 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-11-20 05:32:09,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 05:32:09,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-20 05:32:09,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:09,146 INFO L225 Difference]: With dead ends: 38 [2019-11-20 05:32:09,146 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 05:32:09,147 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 05:32:09,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 05:32:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2019-11-20 05:32:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-20 05:32:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-11-20 05:32:09,157 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 10 [2019-11-20 05:32:09,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:09,157 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-11-20 05:32:09,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 05:32:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-11-20 05:32:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 05:32:09,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:09,158 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:09,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:09,359 INFO L410 AbstractCegarLoop]: === Iteration 3 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:09,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:09,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2095006102, now seen corresponding path program 1 times [2019-11-20 05:32:09,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:09,360 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1728511172] [2019-11-20 05:32:09,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/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 05:32:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:09,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 05:32:09,578 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:09,605 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 05:32:09,605 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:09,649 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 05:32:09,649 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1728511172] [2019-11-20 05:32:09,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:09,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-20 05:32:09,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450951072] [2019-11-20 05:32:09,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 05:32:09,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:09,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 05:32:09,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:32:09,651 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 6 states. [2019-11-20 05:32:09,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:09,754 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2019-11-20 05:32:09,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 05:32:09,762 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2019-11-20 05:32:09,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:09,764 INFO L225 Difference]: With dead ends: 34 [2019-11-20 05:32:09,764 INFO L226 Difference]: Without dead ends: 34 [2019-11-20 05:32:09,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:32:09,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-20 05:32:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2019-11-20 05:32:09,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 05:32:09,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-20 05:32:09,771 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 10 [2019-11-20 05:32:09,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:09,771 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-20 05:32:09,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 05:32:09,772 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-20 05:32:09,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 05:32:09,772 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:09,773 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:09,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:09,973 INFO L410 AbstractCegarLoop]: === Iteration 4 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:09,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:09,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2094946520, now seen corresponding path program 1 times [2019-11-20 05:32:09,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:09,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1140604429] [2019-11-20 05:32:09,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/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 05:32:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:10,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 05:32:10,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:10,261 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 05:32:10,262 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:10,286 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:10,287 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:10,287 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:13 [2019-11-20 05:32:10,319 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 05:32:10,319 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:10,464 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 05:32:10,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1140604429] [2019-11-20 05:32:10,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:10,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-11-20 05:32:10,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285021131] [2019-11-20 05:32:10,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 05:32:10,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:10,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 05:32:10,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-20 05:32:10,467 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 5 states. [2019-11-20 05:32:10,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:10,728 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-11-20 05:32:10,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 05:32:10,729 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-11-20 05:32:10,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:10,730 INFO L225 Difference]: With dead ends: 38 [2019-11-20 05:32:10,730 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 05:32:10,731 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-20 05:32:10,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 05:32:10,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2019-11-20 05:32:10,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-20 05:32:10,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-20 05:32:10,736 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 10 [2019-11-20 05:32:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:10,737 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-20 05:32:10,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 05:32:10,737 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-20 05:32:10,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 05:32:10,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:10,738 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:10,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:10,942 INFO L410 AbstractCegarLoop]: === Iteration 5 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:10,942 INFO L82 PathProgramCache]: Analyzing trace with hash 2136386996, now seen corresponding path program 1 times [2019-11-20 05:32:10,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:10,943 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1735112608] [2019-11-20 05:32:10,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/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 05:32:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:11,210 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 05:32:11,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:11,221 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 05:32:11,221 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:11,223 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:11,224 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:11,224 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 05:32:11,257 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 05:32:11,257 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:11,267 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 05:32:11,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1735112608] [2019-11-20 05:32:11,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:11,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2019-11-20 05:32:11,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086842804] [2019-11-20 05:32:11,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 05:32:11,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:11,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 05:32:11,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 05:32:11,269 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 5 states. [2019-11-20 05:32:11,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:11,416 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-11-20 05:32:11,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 05:32:11,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-11-20 05:32:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:11,418 INFO L225 Difference]: With dead ends: 30 [2019-11-20 05:32:11,418 INFO L226 Difference]: Without dead ends: 30 [2019-11-20 05:32:11,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:32:11,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-20 05:32:11,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-20 05:32:11,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-20 05:32:11,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-11-20 05:32:11,424 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 13 [2019-11-20 05:32:11,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:11,424 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-11-20 05:32:11,425 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 05:32:11,425 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-11-20 05:32:11,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 05:32:11,426 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:11,426 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:11,629 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:11,629 INFO L410 AbstractCegarLoop]: === Iteration 6 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:11,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2136386997, now seen corresponding path program 1 times [2019-11-20 05:32:11,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:11,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [276006124] [2019-11-20 05:32:11,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/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 05:32:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:11,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 05:32:11,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:11,870 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 05:32:11,871 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:11,878 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:11,879 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:11,879 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 05:32:11,947 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 05:32:11,947 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:12,277 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 05:32:12,278 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [276006124] [2019-11-20 05:32:12,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:12,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-20 05:32:12,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183990378] [2019-11-20 05:32:12,279 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 05:32:12,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:12,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 05:32:12,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 05:32:12,280 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 10 states. [2019-11-20 05:32:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:13,001 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2019-11-20 05:32:13,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 05:32:13,002 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-11-20 05:32:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:13,004 INFO L225 Difference]: With dead ends: 50 [2019-11-20 05:32:13,004 INFO L226 Difference]: Without dead ends: 50 [2019-11-20 05:32:13,005 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2019-11-20 05:32:13,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-20 05:32:13,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 31. [2019-11-20 05:32:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-20 05:32:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2019-11-20 05:32:13,010 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 13 [2019-11-20 05:32:13,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:13,010 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2019-11-20 05:32:13,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 05:32:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2019-11-20 05:32:13,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 05:32:13,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:13,011 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:13,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:13,214 INFO L410 AbstractCegarLoop]: === Iteration 7 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:13,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1041914347, now seen corresponding path program 1 times [2019-11-20 05:32:13,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:13,215 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1501928772] [2019-11-20 05:32:13,215 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/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 05:32:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:13,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 05:32:13,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:13,406 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 05:32:13,406 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:13,419 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:13,420 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:13,420 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:16 [2019-11-20 05:32:13,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:13,529 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:14,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1501928772] [2019-11-20 05:32:14,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:32:14,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2019-11-20 05:32:14,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830936917] [2019-11-20 05:32:14,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 05:32:14,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:14,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 05:32:14,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 05:32:14,068 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 10 states. [2019-11-20 05:32:14,413 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2019-11-20 05:32:15,178 WARN L191 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-11-20 05:32:15,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:15,530 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2019-11-20 05:32:15,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:32:15,532 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-11-20 05:32:15,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:15,533 INFO L225 Difference]: With dead ends: 54 [2019-11-20 05:32:15,533 INFO L226 Difference]: Without dead ends: 54 [2019-11-20 05:32:15,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-11-20 05:32:15,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-20 05:32:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2019-11-20 05:32:15,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-20 05:32:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2019-11-20 05:32:15,547 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 14 [2019-11-20 05:32:15,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:15,548 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2019-11-20 05:32:15,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 05:32:15,548 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2019-11-20 05:32:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 05:32:15,549 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:15,549 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:15,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:15,753 INFO L410 AbstractCegarLoop]: === Iteration 8 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:15,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:15,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2015340679, now seen corresponding path program 1 times [2019-11-20 05:32:15,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:15,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [604158074] [2019-11-20 05:32:15,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/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 05:32:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:15,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 05:32:15,909 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:15,936 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 12 treesize of output 8 [2019-11-20 05:32:15,936 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:15,941 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:15,941 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:15,941 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2019-11-20 05:32:15,992 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 17 treesize of output 9 [2019-11-20 05:32:15,992 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:15,997 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:15,997 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 05:32:15,998 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:5 [2019-11-20 05:32:16,011 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 05:32:16,011 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:16,068 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 17 treesize of output 15 [2019-11-20 05:32:16,079 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2019-11-20 05:32:16,081 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:16,082 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:16,083 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:16,085 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:16,086 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:16,086 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:17, output treesize:6 [2019-11-20 05:32:16,094 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 05:32:16,094 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [604158074] [2019-11-20 05:32:16,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:16,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 11 [2019-11-20 05:32:16,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389270843] [2019-11-20 05:32:16,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 05:32:16,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:16,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 05:32:16,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-11-20 05:32:16,096 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 11 states. [2019-11-20 05:32:16,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:16,268 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2019-11-20 05:32:16,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 05:32:16,269 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2019-11-20 05:32:16,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:16,270 INFO L225 Difference]: With dead ends: 50 [2019-11-20 05:32:16,270 INFO L226 Difference]: Without dead ends: 50 [2019-11-20 05:32:16,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-11-20 05:32:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-20 05:32:16,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2019-11-20 05:32:16,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-20 05:32:16,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2019-11-20 05:32:16,277 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 16 [2019-11-20 05:32:16,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:16,280 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2019-11-20 05:32:16,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 05:32:16,280 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2019-11-20 05:32:16,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 05:32:16,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:16,280 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:16,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:16,481 INFO L410 AbstractCegarLoop]: === Iteration 9 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:16,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:16,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1886599607, now seen corresponding path program 1 times [2019-11-20 05:32:16,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:16,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [968224682] [2019-11-20 05:32:16,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:16,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 05:32:16,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:16,653 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 05:32:16,653 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:16,662 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:16,663 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:16,663 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:13 [2019-11-20 05:32:16,693 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 17 treesize of output 13 [2019-11-20 05:32:16,693 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:16,729 INFO L567 ElimStorePlain]: treesize reduction 20, result has 53.5 percent of original size [2019-11-20 05:32:16,730 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:16,730 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:23 [2019-11-20 05:32:16,838 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:16,838 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2019-11-20 05:32:16,839 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:16,842 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:16,843 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:32:16,860 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:16,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:16,861 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:32:16,862 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:27 [2019-11-20 05:32:16,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:16,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:17,212 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:17,894 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 39 treesize of output 37 [2019-11-20 05:32:17,935 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2019-11-20 05:32:17,937 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-11-20 05:32:18,030 INFO L567 ElimStorePlain]: treesize reduction 6, result has 83.3 percent of original size [2019-11-20 05:32:18,031 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:18,044 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 37 treesize of output 35 [2019-11-20 05:32:18,050 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:18,055 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:18,064 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2019-11-20 05:32:18,066 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:18,092 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:18,092 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:18,105 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 39 treesize of output 37 [2019-11-20 05:32:18,140 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2019-11-20 05:32:18,141 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 2 xjuncts. [2019-11-20 05:32:18,212 INFO L567 ElimStorePlain]: treesize reduction 6, result has 83.3 percent of original size [2019-11-20 05:32:18,212 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:18,302 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:18,302 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2019-11-20 05:32:18,303 INFO L221 ElimStorePlain]: Needed 7 recursive calls to eliminate 1 variables, input treesize:116, output treesize:83 [2019-11-20 05:32:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:18,549 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [968224682] [2019-11-20 05:32:18,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:32:18,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2019-11-20 05:32:18,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389784023] [2019-11-20 05:32:18,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 05:32:18,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:18,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 05:32:18,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-11-20 05:32:18,551 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand 17 states. [2019-11-20 05:32:18,895 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-11-20 05:32:19,401 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-11-20 05:32:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:25,194 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2019-11-20 05:32:25,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-20 05:32:25,197 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 16 [2019-11-20 05:32:25,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:25,198 INFO L225 Difference]: With dead ends: 59 [2019-11-20 05:32:25,198 INFO L226 Difference]: Without dead ends: 59 [2019-11-20 05:32:25,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2019-11-20 05:32:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-20 05:32:25,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2019-11-20 05:32:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-20 05:32:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-11-20 05:32:25,205 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 16 [2019-11-20 05:32:25,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:25,205 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-11-20 05:32:25,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 05:32:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-11-20 05:32:25,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 05:32:25,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:25,207 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:25,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:25,408 INFO L410 AbstractCegarLoop]: === Iteration 10 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:25,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:25,408 INFO L82 PathProgramCache]: Analyzing trace with hash 280521542, now seen corresponding path program 1 times [2019-11-20 05:32:25,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:25,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1872476425] [2019-11-20 05:32:25,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:25,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 05:32:25,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:25,569 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 05:32:25,570 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:25,571 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:25,572 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:25,572 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 05:32:25,638 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:25,639 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 39 [2019-11-20 05:32:25,639 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:25,657 INFO L567 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2019-11-20 05:32:25,658 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:25,659 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:32:25,659 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:15 [2019-11-20 05:32:25,659 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:25,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:25,684 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:25,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:25,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:25,720 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:25,731 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:25,749 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 05:32:25,749 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:29,812 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 05:32:29,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1872476425] [2019-11-20 05:32:29,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:29,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 8 [2019-11-20 05:32:29,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644279585] [2019-11-20 05:32:29,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 05:32:29,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:29,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 05:32:29,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=49, Unknown=2, NotChecked=0, Total=72 [2019-11-20 05:32:29,814 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 9 states. [2019-11-20 05:32:29,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:29,954 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2019-11-20 05:32:29,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 05:32:29,955 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2019-11-20 05:32:29,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:29,956 INFO L225 Difference]: With dead ends: 52 [2019-11-20 05:32:29,956 INFO L226 Difference]: Without dead ends: 37 [2019-11-20 05:32:29,956 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=34, Invalid=74, Unknown=2, NotChecked=0, Total=110 [2019-11-20 05:32:29,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-20 05:32:29,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-20 05:32:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-20 05:32:29,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-11-20 05:32:29,959 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 19 [2019-11-20 05:32:29,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:29,959 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-11-20 05:32:29,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 05:32:29,960 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-11-20 05:32:29,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 05:32:29,960 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:29,960 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:30,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:30,161 INFO L410 AbstractCegarLoop]: === Iteration 11 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:30,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:30,162 INFO L82 PathProgramCache]: Analyzing trace with hash 305342903, now seen corresponding path program 2 times [2019-11-20 05:32:30,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:30,162 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1620913539] [2019-11-20 05:32:30,162 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:30,325 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:32:30,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:32:30,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-20 05:32:30,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:30,339 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 05:32:30,339 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:30,350 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:30,351 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:30,351 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:16 [2019-11-20 05:32:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:30,574 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:31,892 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1620913539] [2019-11-20 05:32:31,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:32:31,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2019-11-20 05:32:31,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230890614] [2019-11-20 05:32:31,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 05:32:31,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:31,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 05:32:31,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-11-20 05:32:31,894 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 17 states. [2019-11-20 05:32:33,205 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-11-20 05:32:33,643 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2019-11-20 05:32:33,996 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-20 05:32:34,478 WARN L191 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2019-11-20 05:32:34,797 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-11-20 05:32:35,247 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2019-11-20 05:32:35,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:35,635 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2019-11-20 05:32:35,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 05:32:35,636 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 22 [2019-11-20 05:32:35,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:35,637 INFO L225 Difference]: With dead ends: 61 [2019-11-20 05:32:35,637 INFO L226 Difference]: Without dead ends: 54 [2019-11-20 05:32:35,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2019-11-20 05:32:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-20 05:32:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2019-11-20 05:32:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-20 05:32:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2019-11-20 05:32:35,641 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 22 [2019-11-20 05:32:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:35,641 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2019-11-20 05:32:35,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 05:32:35,641 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2019-11-20 05:32:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-20 05:32:35,642 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:35,642 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:35,842 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:35,843 INFO L410 AbstractCegarLoop]: === Iteration 12 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:35,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1550660337, now seen corresponding path program 2 times [2019-11-20 05:32:35,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:35,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [876140347] [2019-11-20 05:32:35,844 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:36,007 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:32:36,008 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:32:36,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 05:32:36,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:36,022 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 05:32:36,022 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:36,031 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:36,031 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:36,031 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:13 [2019-11-20 05:32:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 05:32:36,295 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:37,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 05:32:40,577 WARN L191 SmtUtils]: Spent 2.31 s on a formula simplification that was a NOOP. DAG size: 31 [2019-11-20 05:32:52,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-20 05:32:52,172 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [876140347] [2019-11-20 05:32:52,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:32:52,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-11-20 05:32:52,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675582323] [2019-11-20 05:32:52,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 05:32:52,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:52,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 05:32:52,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=124, Unknown=1, NotChecked=0, Total=182 [2019-11-20 05:32:52,174 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 14 states. [2019-11-20 05:32:52,780 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2019-11-20 05:32:53,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:53,328 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-11-20 05:32:53,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 05:32:53,329 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2019-11-20 05:32:53,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:53,330 INFO L225 Difference]: With dead ends: 42 [2019-11-20 05:32:53,330 INFO L226 Difference]: Without dead ends: 42 [2019-11-20 05:32:53,330 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=84, Invalid=155, Unknown=1, NotChecked=0, Total=240 [2019-11-20 05:32:53,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-20 05:32:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2019-11-20 05:32:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-20 05:32:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2019-11-20 05:32:53,334 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 22 [2019-11-20 05:32:53,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:53,334 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2019-11-20 05:32:53,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 05:32:53,334 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2019-11-20 05:32:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 05:32:53,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:53,335 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:53,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:53,539 INFO L410 AbstractCegarLoop]: === Iteration 13 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:53,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:53,539 INFO L82 PathProgramCache]: Analyzing trace with hash 608981780, now seen corresponding path program 1 times [2019-11-20 05:32:53,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:53,539 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1962192757] [2019-11-20 05:32:53,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:53,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 05:32:53,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:53,734 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 05:32:53,734 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:53,741 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:53,742 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:53,742 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2019-11-20 05:32:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-20 05:32:53,997 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-20 05:32:54,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1962192757] [2019-11-20 05:32:54,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:32:54,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-11-20 05:32:54,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56130956] [2019-11-20 05:32:54,517 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-20 05:32:54,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:54,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-20 05:32:54,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2019-11-20 05:32:54,518 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 18 states. [2019-11-20 05:32:55,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:55,217 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2019-11-20 05:32:55,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 05:32:55,218 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 29 [2019-11-20 05:32:55,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:55,219 INFO L225 Difference]: With dead ends: 44 [2019-11-20 05:32:55,219 INFO L226 Difference]: Without dead ends: 34 [2019-11-20 05:32:55,219 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2019-11-20 05:32:55,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-20 05:32:55,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2019-11-20 05:32:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-20 05:32:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2019-11-20 05:32:55,222 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2019-11-20 05:32:55,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:55,222 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2019-11-20 05:32:55,223 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-20 05:32:55,223 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2019-11-20 05:32:55,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 05:32:55,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:55,224 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:55,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:55,427 INFO L410 AbstractCegarLoop]: === Iteration 14 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:55,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:55,428 INFO L82 PathProgramCache]: Analyzing trace with hash 976723133, now seen corresponding path program 2 times [2019-11-20 05:32:55,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:55,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1408488717] [2019-11-20 05:32:55,428 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:55,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 05:32:55,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:32:55,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-20 05:32:55,630 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:55,920 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 15 treesize of output 11 [2019-11-20 05:32:55,920 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:55,964 INFO L567 ElimStorePlain]: treesize reduction 14, result has 65.0 percent of original size [2019-11-20 05:32:55,965 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:32:55,965 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2019-11-20 05:32:56,177 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:56,179 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:56,179 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2019-11-20 05:32:56,180 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:56,189 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:56,191 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:56,191 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:5 [2019-11-20 05:32:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:56,222 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:56,474 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 17 [2019-11-20 05:32:56,489 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2019-11-20 05:32:56,490 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:56,492 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:56,493 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:56,514 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:56,514 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:56,514 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:36, output treesize:25 [2019-11-20 05:32:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:57,695 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1408488717] [2019-11-20 05:32:57,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:32:57,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2019-11-20 05:32:57,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815834902] [2019-11-20 05:32:57,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 05:32:57,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:57,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 05:32:57,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2019-11-20 05:32:57,697 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 26 states. [2019-11-20 05:32:58,615 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2019-11-20 05:32:59,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:59,313 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2019-11-20 05:32:59,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-20 05:32:59,314 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2019-11-20 05:32:59,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:59,315 INFO L225 Difference]: With dead ends: 49 [2019-11-20 05:32:59,315 INFO L226 Difference]: Without dead ends: 38 [2019-11-20 05:32:59,316 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2019-11-20 05:32:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-20 05:32:59,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-11-20 05:32:59,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-20 05:32:59,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-20 05:32:59,319 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 30 [2019-11-20 05:32:59,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:59,319 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-20 05:32:59,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 05:32:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-20 05:32:59,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-20 05:32:59,320 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:59,320 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:59,521 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:59,521 INFO L410 AbstractCegarLoop]: === Iteration 15 === [cstrlenErr1REQUIRES_VIOLATION, cstrlenErr0REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 05:32:59,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:59,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1134145536, now seen corresponding path program 3 times [2019-11-20 05:32:59,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:59,522 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1559245316] [2019-11-20 05:32:59,522 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:59,763 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-20 05:32:59,763 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 05:32:59,765 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-20 05:32:59,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:59,784 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 05:32:59,784 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:59,793 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:59,793 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:59,794 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:13 [2019-11-20 05:32:59,826 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 16 treesize of output 12 [2019-11-20 05:32:59,827 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:59,853 INFO L567 ElimStorePlain]: treesize reduction 16, result has 54.3 percent of original size [2019-11-20 05:32:59,854 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:59,854 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:19 [2019-11-20 05:32:59,947 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:59,947 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2019-11-20 05:32:59,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:59,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:59,949 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:33:00,009 INFO L567 ElimStorePlain]: treesize reduction 6, result has 84.6 percent of original size [2019-11-20 05:33:00,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:33:00,010 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:33:00,011 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:33 [2019-11-20 05:33:00,011 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:33:00,075 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:33:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-20 05:33:00,580 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:33:01,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 05:33:03,352 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2019-11-20 05:33:21,095 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 57 treesize of output 55 [2019-11-20 05:33:21,142 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2019-11-20 05:33:21,143 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2019-11-20 05:33:21,287 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2019-11-20 05:33:21,287 INFO L567 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2019-11-20 05:33:21,288 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:33:21,641 WARN L191 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2019-11-20 05:33:21,641 INFO L567 ElimStorePlain]: treesize reduction 10, result has 90.6 percent of original size [2019-11-20 05:33:21,669 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 47 treesize of output 45 [2019-11-20 05:33:21,730 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2019-11-20 05:33:21,733 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 2 xjuncts. [2019-11-20 05:33:21,879 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2019-11-20 05:33:21,879 INFO L567 ElimStorePlain]: treesize reduction 6, result has 86.4 percent of original size [2019-11-20 05:33:21,879 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:33:22,056 WARN L191 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-11-20 05:33:22,056 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:33:22,057 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-20 05:33:22,057 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:115, output treesize:87 [2019-11-20 05:33:22,649 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2019-11-20 05:33:22,795 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-20 05:33:22,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1559245316] [2019-11-20 05:33:22,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 05:33:22,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2019-11-20 05:33:22,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361787925] [2019-11-20 05:33:22,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 05:33:22,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:33:22,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 05:33:22,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=228, Unknown=3, NotChecked=0, Total=272 [2019-11-20 05:33:22,797 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 17 states. [2019-11-20 05:33:27,398 WARN L191 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2019-11-20 05:33:31,769 WARN L191 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2019-11-20 05:33:40,654 WARN L191 SmtUtils]: Spent 8.48 s on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2019-11-20 05:33:49,740 WARN L191 SmtUtils]: Spent 8.65 s on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2019-11-20 05:34:02,514 WARN L191 SmtUtils]: Spent 8.81 s on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2019-11-20 05:34:12,830 WARN L191 SmtUtils]: Spent 8.63 s on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2019-11-20 05:34:22,215 WARN L191 SmtUtils]: Spent 8.81 s on a formula simplification. DAG size of input: 81 DAG size of output: 65 [2019-11-20 05:34:35,414 WARN L191 SmtUtils]: Spent 8.84 s on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2019-11-20 05:34:35,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:34:35,572 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2019-11-20 05:34:35,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 05:34:35,576 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2019-11-20 05:34:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:34:35,577 INFO L225 Difference]: With dead ends: 34 [2019-11-20 05:34:35,577 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 05:34:35,577 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 91.6s TimeCoverageRelationStatistics Valid=123, Invalid=471, Unknown=6, NotChecked=0, Total=600 [2019-11-20 05:34:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 05:34:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 05:34:35,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 05:34:35,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 05:34:35,578 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2019-11-20 05:34:35,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:34:35,578 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 05:34:35,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 05:34:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 05:34:35,579 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 05:34:35,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:34:35,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 05:34:35 BoogieIcfgContainer [2019-11-20 05:34:35,785 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 05:34:35,785 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 05:34:35,785 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 05:34:35,785 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 05:34:35,786 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:32:07" (3/4) ... [2019-11-20 05:34:35,792 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 05:34:35,797 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2019-11-20 05:34:35,797 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2019-11-20 05:34:35,798 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2019-11-20 05:34:35,798 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2019-11-20 05:34:35,798 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2019-11-20 05:34:35,798 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrlen [2019-11-20 05:34:35,799 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2019-11-20 05:34:35,799 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2019-11-20 05:34:35,803 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2019-11-20 05:34:35,803 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-20 05:34:35,804 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-20 05:34:35,804 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2019-11-20 05:34:35,839 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b66f3703-9e34-4568-8cae-0691a3d5dbbe/bin/uautomizer/witness.graphml [2019-11-20 05:34:35,839 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 05:34:35,840 INFO L168 Benchmark]: Toolchain (without parser) took 150054.07 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 323.0 MB). Free memory was 939.4 MB in the beginning and 877.2 MB in the end (delta: 62.2 MB). Peak memory consumption was 385.2 MB. Max. memory is 11.5 GB. [2019-11-20 05:34:35,841 INFO L168 Benchmark]: CDTParser took 0.75 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 05:34:35,841 INFO L168 Benchmark]: CACSL2BoogieTranslator took 674.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -184.3 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-20 05:34:35,842 INFO L168 Benchmark]: Boogie Preprocessor took 68.09 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 05:34:35,842 INFO L168 Benchmark]: RCFGBuilder took 803.42 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: 48.7 MB). Peak memory consumption was 48.7 MB. Max. memory is 11.5 GB. [2019-11-20 05:34:35,842 INFO L168 Benchmark]: TraceAbstraction took 148446.56 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 175.1 MB). Free memory was 1.1 GB in the beginning and 889.4 MB in the end (delta: 185.6 MB). Peak memory consumption was 360.7 MB. Max. memory is 11.5 GB. [2019-11-20 05:34:35,843 INFO L168 Benchmark]: Witness Printer took 54.21 ms. Allocated memory is still 1.4 GB. Free memory was 889.4 MB in the beginning and 877.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. [2019-11-20 05:34:35,845 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.75 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 674.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 939.4 MB in the beginning and 1.1 GB in the end (delta: -184.3 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 68.09 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 803.42 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: 48.7 MB). Peak memory consumption was 48.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 148446.56 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 175.1 MB). Free memory was 1.1 GB in the beginning and 889.4 MB in the end (delta: 185.6 MB). Peak memory consumption was 360.7 MB. Max. memory is 11.5 GB. * Witness Printer took 54.21 ms. Allocated memory is still 1.4 GB. Free memory was 889.4 MB in the beginning and 877.2 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 530]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 48 locations, 7 error locations. Result: SAFE, OverallTime: 148.3s, OverallIterations: 15, TraceHistogramMax: 4, AutomataDifference: 90.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 289 SDtfs, 533 SDslu, 1152 SDs, 0 SdLazy, 1333 SolverSat, 165 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 11.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 586 GetRequests, 344 SyntacticMatches, 34 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 127.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=53occurred in iteration=9, 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, 15 MinimizatonAttempts, 88 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 51.8s InterpolantComputationTime, 268 NumberOfCodeBlocks, 268 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 506 ConstructedInterpolants, 53 QuantifiedInterpolants, 182485 SizeOfPredicates, 97 NumberOfNonLiveVariables, 860 ConjunctsInSsa, 185 ConjunctsInUnsatCore, 30 InterpolantComputations, 16 PerfectInterpolantSequences, 114/204 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 proved your program to be correct! Received shutdown request...