./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/lcp.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/lcp.c -s /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 99469a4d9e5d9407366653a2d47248a07b3d0735 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 07:30:45,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:30:45,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:30:45,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:30:45,881 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:30:45,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:30:45,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:30:45,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:30:45,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:30:45,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:30:45,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:30:45,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:30:45,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:30:45,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:30:45,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:30:45,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:30:45,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:30:45,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:30:45,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:30:45,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:30:45,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:30:45,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:30:45,902 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:30:45,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:30:45,905 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:30:45,906 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:30:45,906 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:30:45,907 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:30:45,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:30:45,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:30:45,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:30:45,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:30:45,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:30:45,910 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:30:45,911 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:30:45,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:30:45,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:30:45,913 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:30:45,913 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:30:45,914 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:30:45,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:30:45,915 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 07:30:45,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:30:45,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:30:45,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:30:45,933 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:30:45,933 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:30:45,934 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:30:45,934 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 07:30:45,934 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:30:45,934 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:30:45,934 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 07:30:45,934 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 07:30:45,934 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:30:45,934 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 07:30:45,935 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 07:30:45,935 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 07:30:45,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 07:30:45,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 07:30:45,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:30:45,936 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:30:45,936 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 07:30:45,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 07:30:45,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:30:45,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:30:45,936 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 07:30:45,936 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 07:30:45,936 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 07:30:45,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:30:45,937 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:30:45,937 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:30:45,937 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:30:45,937 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:30:45,937 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:30:45,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:30:45,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:30:45,938 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:30:45,938 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 07:30:45,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 07:30:45,938 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:30:45,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:30:45,938 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99469a4d9e5d9407366653a2d47248a07b3d0735 [2020-12-09 07:30:46,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:30:46,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:30:46,153 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:30:46,155 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:30:46,155 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:30:46,156 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/../../sv-benchmarks/c/verifythis/lcp.c [2020-12-09 07:30:46,201 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/data/55f2825ab/216de1ff293647458c4e56238f548187/FLAG0614de736 [2020-12-09 07:30:46,581 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:30:46,582 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/sv-benchmarks/c/verifythis/lcp.c [2020-12-09 07:30:46,586 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/data/55f2825ab/216de1ff293647458c4e56238f548187/FLAG0614de736 [2020-12-09 07:30:46,598 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/data/55f2825ab/216de1ff293647458c4e56238f548187 [2020-12-09 07:30:46,600 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:30:46,601 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:30:46,603 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:30:46,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:30:46,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:30:46,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:30:46" (1/1) ... [2020-12-09 07:30:46,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59cbb22e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:46, skipping insertion in model container [2020-12-09 07:30:46,607 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:30:46" (1/1) ... [2020-12-09 07:30:46,614 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:30:46,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:30:46,725 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/sv-benchmarks/c/verifythis/lcp.c[515,528] [2020-12-09 07:30:46,740 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:30:46,748 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:30:46,758 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/sv-benchmarks/c/verifythis/lcp.c[515,528] [2020-12-09 07:30:46,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:30:46,781 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:30:46,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:46 WrapperNode [2020-12-09 07:30:46,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:30:46,782 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:30:46,782 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:30:46,782 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:30:46,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:46" (1/1) ... [2020-12-09 07:30:46,796 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:46" (1/1) ... [2020-12-09 07:30:46,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:30:46,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:30:46,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:30:46,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:30:46,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:46" (1/1) ... [2020-12-09 07:30:46,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:46" (1/1) ... [2020-12-09 07:30:46,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:46" (1/1) ... [2020-12-09 07:30:46,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:46" (1/1) ... [2020-12-09 07:30:46,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:46" (1/1) ... [2020-12-09 07:30:46,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:46" (1/1) ... [2020-12-09 07:30:46,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:46" (1/1) ... [2020-12-09 07:30:46,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:30:46,847 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:30:46,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:30:46,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:30:46,849 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/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 [2020-12-09 07:30:46,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 07:30:46,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:30:46,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 07:30:46,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:30:46,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:30:46,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 07:30:46,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 07:30:47,316 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:30:47,316 INFO L299 CfgBuilder]: Removed 21 assume(true) statements. [2020-12-09 07:30:47,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:30:47 BoogieIcfgContainer [2020-12-09 07:30:47,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:30:47,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:30:47,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:30:47,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:30:47,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:30:46" (1/3) ... [2020-12-09 07:30:47,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e422d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:30:47, skipping insertion in model container [2020-12-09 07:30:47,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:30:46" (2/3) ... [2020-12-09 07:30:47,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56e422d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:30:47, skipping insertion in model container [2020-12-09 07:30:47,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:30:47" (3/3) ... [2020-12-09 07:30:47,323 INFO L111 eAbstractionObserver]: Analyzing ICFG lcp.c [2020-12-09 07:30:47,333 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:30:47,335 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 18 error locations. [2020-12-09 07:30:47,343 INFO L253 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2020-12-09 07:30:47,357 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:30:47,357 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 07:30:47,357 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:30:47,357 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:30:47,357 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:30:47,357 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:30:47,357 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:30:47,357 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:30:47,367 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-09 07:30:47,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 07:30:47,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:30:47,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 07:30:47,372 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:30:47,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:30:47,380 INFO L82 PathProgramCache]: Analyzing trace with hash 4402214, now seen corresponding path program 1 times [2020-12-09 07:30:47,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:30:47,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370084231] [2020-12-09 07:30:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:30:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:30:47,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:30:47,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370084231] [2020-12-09 07:30:47,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:30:47,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 07:30:47,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410147730] [2020-12-09 07:30:47,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 07:30:47,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:30:47,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 07:30:47,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:30:47,548 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-12-09 07:30:47,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:30:47,578 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-12-09 07:30:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 07:30:47,579 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 07:30:47,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:30:47,585 INFO L225 Difference]: With dead ends: 39 [2020-12-09 07:30:47,585 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 07:30:47,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:30:47,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 07:30:47,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-09 07:30:47,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 07:30:47,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-09 07:30:47,608 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 4 [2020-12-09 07:30:47,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:30:47,608 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-09 07:30:47,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 07:30:47,609 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-09 07:30:47,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 07:30:47,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:30:47,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 07:30:47,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 07:30:47,609 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:30:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:30:47,610 INFO L82 PathProgramCache]: Analyzing trace with hash 4402215, now seen corresponding path program 1 times [2020-12-09 07:30:47,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:30:47,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725555162] [2020-12-09 07:30:47,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:30:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:30:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:30:47,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725555162] [2020-12-09 07:30:47,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:30:47,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 07:30:47,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525723736] [2020-12-09 07:30:47,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 07:30:47,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:30:47,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 07:30:47,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 07:30:47,699 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 5 states. [2020-12-09 07:30:47,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:30:47,790 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2020-12-09 07:30:47,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 07:30:47,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-12-09 07:30:47,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:30:47,791 INFO L225 Difference]: With dead ends: 47 [2020-12-09 07:30:47,791 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 07:30:47,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:30:47,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 07:30:47,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-12-09 07:30:47,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 07:30:47,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-12-09 07:30:47,796 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 4 [2020-12-09 07:30:47,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:30:47,796 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-12-09 07:30:47,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 07:30:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-12-09 07:30:47,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 07:30:47,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:30:47,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 07:30:47,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 07:30:47,797 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:30:47,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:30:47,798 INFO L82 PathProgramCache]: Analyzing trace with hash 136468635, now seen corresponding path program 1 times [2020-12-09 07:30:47,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:30:47,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354598263] [2020-12-09 07:30:47,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:30:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:30:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:30:47,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354598263] [2020-12-09 07:30:47,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:30:47,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 07:30:47,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877641092] [2020-12-09 07:30:47,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 07:30:47,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:30:47,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 07:30:47,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-09 07:30:47,873 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 5 states. [2020-12-09 07:30:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:30:47,941 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-12-09 07:30:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 07:30:47,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-12-09 07:30:47,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:30:47,942 INFO L225 Difference]: With dead ends: 44 [2020-12-09 07:30:47,942 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 07:30:47,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:30:47,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 07:30:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-09 07:30:47,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 07:30:47,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-12-09 07:30:47,946 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 5 [2020-12-09 07:30:47,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:30:47,947 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-12-09 07:30:47,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 07:30:47,947 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-12-09 07:30:47,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 07:30:47,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:30:47,947 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2020-12-09 07:30:47,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 07:30:47,948 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:30:47,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:30:47,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1988906992, now seen corresponding path program 1 times [2020-12-09 07:30:47,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:30:47,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661146997] [2020-12-09 07:30:47,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:30:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:30:47,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:30:47,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661146997] [2020-12-09 07:30:47,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:30:47,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 07:30:47,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142836657] [2020-12-09 07:30:47,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 07:30:47,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:30:47,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 07:30:47,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:30:47,973 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 3 states. [2020-12-09 07:30:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:30:47,984 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-12-09 07:30:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 07:30:47,985 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-09 07:30:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:30:47,986 INFO L225 Difference]: With dead ends: 45 [2020-12-09 07:30:47,986 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 07:30:47,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:30:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 07:30:47,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-09 07:30:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 07:30:47,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-12-09 07:30:47,991 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 7 [2020-12-09 07:30:47,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:30:47,992 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-12-09 07:30:47,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 07:30:47,992 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-12-09 07:30:47,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 07:30:47,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:30:47,993 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-12-09 07:30:47,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 07:30:47,993 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:30:47,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:30:47,994 INFO L82 PathProgramCache]: Analyzing trace with hash 201361976, now seen corresponding path program 1 times [2020-12-09 07:30:47,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:30:47,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788550617] [2020-12-09 07:30:47,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:30:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:30:48,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:30:48,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788550617] [2020-12-09 07:30:48,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091543195] [2020-12-09 07:30:48,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:30:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:30:48,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-09 07:30:48,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:30:48,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 07:30:48,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-09 07:30:48,276 INFO L348 Elim1Store]: treesize reduction 42, result has 63.5 percent of original size [2020-12-09 07:30:48,277 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 80 [2020-12-09 07:30:48,282 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 07:30:48,350 INFO L625 ElimStorePlain]: treesize reduction 36, result has 60.9 percent of original size [2020-12-09 07:30:48,362 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 07:30:48,362 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:30, output treesize:28 [2020-12-09 07:30:48,437 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-09 07:30:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:30:48,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:30:48,534 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 07:30:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:30:48,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1025146397] [2020-12-09 07:30:48,588 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 07:30:48,589 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:30:48,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:30:48,596 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:30:48,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:30:48,695 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:30:48,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:30:49,247 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:30:49,652 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 93 [2020-12-09 07:30:50,658 WARN L197 SmtUtils]: Spent 907.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 191 [2020-12-09 07:30:50,941 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2020-12-09 07:30:51,230 WARN L197 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-12-09 07:30:51,560 WARN L197 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2020-12-09 07:30:51,833 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2020-12-09 07:30:51,835 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:30:51,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:30:51,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2020-12-09 07:30:51,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560512421] [2020-12-09 07:30:51,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 07:30:51,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:30:51,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 07:30:51,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2020-12-09 07:30:51,837 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 15 states. [2020-12-09 07:30:52,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:30:52,020 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2020-12-09 07:30:52,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 07:30:52,020 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 9 [2020-12-09 07:30:52,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:30:52,021 INFO L225 Difference]: With dead ends: 73 [2020-12-09 07:30:52,021 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 07:30:52,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-12-09 07:30:52,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 07:30:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 43. [2020-12-09 07:30:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 07:30:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-12-09 07:30:52,027 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 9 [2020-12-09 07:30:52,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:30:52,028 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-12-09 07:30:52,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 07:30:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-12-09 07:30:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 07:30:52,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:30:52,028 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2020-12-09 07:30:52,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:30:52,231 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:30:52,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:30:52,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1947253930, now seen corresponding path program 1 times [2020-12-09 07:30:52,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:30:52,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465047623] [2020-12-09 07:30:52,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:30:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:30:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:30:52,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465047623] [2020-12-09 07:30:52,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675798218] [2020-12-09 07:30:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:30:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:30:52,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-09 07:30:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:30:52,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:30:52,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:30:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:30:52,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [297107303] [2020-12-09 07:30:52,703 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 07:30:52,703 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:30:52,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:30:52,703 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:30:52,704 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:30:52,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:30:52,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:30:53,234 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:30:53,907 WARN L197 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 103 [2020-12-09 07:30:54,890 WARN L197 SmtUtils]: Spent 902.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 191 [2020-12-09 07:30:55,170 WARN L197 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2020-12-09 07:30:55,465 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-12-09 07:30:55,792 WARN L197 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2020-12-09 07:30:56,075 WARN L197 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2020-12-09 07:30:56,076 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:30:56,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:30:56,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2020-12-09 07:30:56,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644897291] [2020-12-09 07:30:56,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 07:30:56,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:30:56,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 07:30:56,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-12-09 07:30:56,078 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 15 states. [2020-12-09 07:30:56,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:30:56,272 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-12-09 07:30:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 07:30:56,273 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 10 [2020-12-09 07:30:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:30:56,273 INFO L225 Difference]: With dead ends: 72 [2020-12-09 07:30:56,273 INFO L226 Difference]: Without dead ends: 72 [2020-12-09 07:30:56,274 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-12-09 07:30:56,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-09 07:30:56,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 42. [2020-12-09 07:30:56,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-09 07:30:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-12-09 07:30:56,277 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 10 [2020-12-09 07:30:56,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:30:56,277 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-12-09 07:30:56,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 07:30:56,277 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-12-09 07:30:56,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 07:30:56,278 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:30:56,278 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:30:56,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-09 07:30:56,480 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:30:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:30:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash 235611903, now seen corresponding path program 1 times [2020-12-09 07:30:56,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:30:56,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930833627] [2020-12-09 07:30:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:30:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:30:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:30:56,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930833627] [2020-12-09 07:30:56,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907276315] [2020-12-09 07:30:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:30:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:30:56,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 07:30:56,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:30:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 07:30:56,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:30:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 07:30:56,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 07:30:56,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [4] total 6 [2020-12-09 07:30:56,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581001349] [2020-12-09 07:30:56,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 07:30:56,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:30:56,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 07:30:56,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-09 07:30:56,945 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 6 states. [2020-12-09 07:30:57,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:30:57,001 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-12-09 07:30:57,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 07:30:57,001 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-09 07:30:57,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:30:57,002 INFO L225 Difference]: With dead ends: 37 [2020-12-09 07:30:57,002 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 07:30:57,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 8 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-12-09 07:30:57,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 07:30:57,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-09 07:30:57,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-09 07:30:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-09 07:30:57,004 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 11 [2020-12-09 07:30:57,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:30:57,005 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-09 07:30:57,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 07:30:57,005 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-09 07:30:57,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 07:30:57,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:30:57,005 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:30:57,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-09 07:30:57,207 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:30:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:30:57,208 INFO L82 PathProgramCache]: Analyzing trace with hash 235611904, now seen corresponding path program 1 times [2020-12-09 07:30:57,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:30:57,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524591706] [2020-12-09 07:30:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:30:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:30:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:30:57,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524591706] [2020-12-09 07:30:57,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491038201] [2020-12-09 07:30:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:30:57,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:30:57,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-09 07:30:57,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:30:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:30:57,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:30:57,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:30:57,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [67923745] [2020-12-09 07:30:57,773 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 07:30:57,773 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:30:57,773 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:30:57,773 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:30:57,774 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:30:57,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:30:57,849 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:30:58,427 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:30:58,951 WARN L197 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 119 [2020-12-09 07:31:00,155 WARN L197 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 214 DAG size of output: 180 [2020-12-09 07:31:00,435 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2020-12-09 07:31:00,717 WARN L197 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-12-09 07:31:01,047 WARN L197 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2020-12-09 07:31:01,578 WARN L197 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 113 [2020-12-09 07:31:01,579 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:31:01,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:31:01,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2020-12-09 07:31:01,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655080084] [2020-12-09 07:31:01,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-09 07:31:01,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:01,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-09 07:31:01,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2020-12-09 07:31:01,581 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 18 states. [2020-12-09 07:31:02,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:02,113 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-12-09 07:31:02,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 07:31:02,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 11 [2020-12-09 07:31:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:02,114 INFO L225 Difference]: With dead ends: 58 [2020-12-09 07:31:02,114 INFO L226 Difference]: Without dead ends: 58 [2020-12-09 07:31:02,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2020-12-09 07:31:02,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-09 07:31:02,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 35. [2020-12-09 07:31:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-09 07:31:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-12-09 07:31:02,117 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 11 [2020-12-09 07:31:02,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:02,117 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-12-09 07:31:02,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-09 07:31:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-12-09 07:31:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 07:31:02,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:02,117 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:31:02,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:31:02,319 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:31:02,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:02,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1285965571, now seen corresponding path program 1 times [2020-12-09 07:31:02,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:02,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404235843] [2020-12-09 07:31:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:02,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:31:02,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404235843] [2020-12-09 07:31:02,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668683502] [2020-12-09 07:31:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:31:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:02,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-09 07:31:02,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:31:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:31:02,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:31:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:31:02,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232610019] [2020-12-09 07:31:02,700 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 07:31:02,700 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:31:02,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:31:02,701 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:31:02,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:31:02,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:31:02,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:31:03,305 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:31:03,830 WARN L197 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 131 [2020-12-09 07:31:05,031 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 214 DAG size of output: 180 [2020-12-09 07:31:05,301 WARN L197 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2020-12-09 07:31:05,575 WARN L197 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-12-09 07:31:05,909 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2020-12-09 07:31:06,439 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 113 [2020-12-09 07:31:06,987 WARN L197 SmtUtils]: Spent 470.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 130 [2020-12-09 07:31:06,988 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:31:06,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:31:06,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 15 [2020-12-09 07:31:06,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399755070] [2020-12-09 07:31:06,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-09 07:31:06,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-09 07:31:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-12-09 07:31:06,989 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2020-12-09 07:31:07,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:07,410 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-12-09 07:31:07,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 07:31:07,411 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 12 [2020-12-09 07:31:07,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:07,411 INFO L225 Difference]: With dead ends: 56 [2020-12-09 07:31:07,411 INFO L226 Difference]: Without dead ends: 56 [2020-12-09 07:31:07,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2020-12-09 07:31:07,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-09 07:31:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2020-12-09 07:31:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 07:31:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-12-09 07:31:07,414 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 12 [2020-12-09 07:31:07,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:07,414 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-12-09 07:31:07,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-09 07:31:07,414 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-12-09 07:31:07,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 07:31:07,415 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:07,415 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:31:07,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:31:07,617 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:31:07,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:07,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1137712779, now seen corresponding path program 1 times [2020-12-09 07:31:07,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:07,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871344314] [2020-12-09 07:31:07,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 07:31:07,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871344314] [2020-12-09 07:31:07,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:31:07,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 07:31:07,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006848341] [2020-12-09 07:31:07,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 07:31:07,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:07,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 07:31:07,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 07:31:07,673 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 6 states. [2020-12-09 07:31:07,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:07,738 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-12-09 07:31:07,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 07:31:07,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 07:31:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:07,738 INFO L225 Difference]: With dead ends: 32 [2020-12-09 07:31:07,738 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 07:31:07,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-09 07:31:07,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 07:31:07,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-09 07:31:07,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 07:31:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-12-09 07:31:07,740 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 14 [2020-12-09 07:31:07,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:07,741 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-12-09 07:31:07,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 07:31:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-12-09 07:31:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 07:31:07,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:07,741 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:31:07,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2020-12-09 07:31:07,741 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:31:07,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:07,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1874553585, now seen corresponding path program 1 times [2020-12-09 07:31:07,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:07,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406653366] [2020-12-09 07:31:07,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:31:07,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406653366] [2020-12-09 07:31:07,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019841155] [2020-12-09 07:31:07,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:31:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:07,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-09 07:31:07,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:31:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:31:07,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:31:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:31:07,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1055720146] [2020-12-09 07:31:07,891 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 07:31:07,891 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:31:07,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:31:07,892 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:31:07,892 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:31:07,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:31:07,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:31:08,545 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:31:09,173 WARN L197 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 142 [2020-12-09 07:31:10,322 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 214 DAG size of output: 180 [2020-12-09 07:31:11,584 WARN L197 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 226 DAG size of output: 192 [2020-12-09 07:31:12,768 WARN L197 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 226 DAG size of output: 183 [2020-12-09 07:31:14,021 WARN L197 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 242 DAG size of output: 195 [2020-12-09 07:31:14,280 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2020-12-09 07:31:14,795 WARN L197 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 113 [2020-12-09 07:31:15,330 WARN L197 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 130 [2020-12-09 07:31:15,976 WARN L197 SmtUtils]: Spent 580.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 144 [2020-12-09 07:31:16,612 WARN L197 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 146 [2020-12-09 07:31:17,227 WARN L197 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 140 [2020-12-09 07:31:17,857 WARN L197 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 140 [2020-12-09 07:31:17,858 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:31:17,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:31:17,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2020-12-09 07:31:17,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861725090] [2020-12-09 07:31:17,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 07:31:17,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:17,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 07:31:17,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-12-09 07:31:17,859 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2020-12-09 07:31:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:17,951 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-09 07:31:17,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 07:31:17,952 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-09 07:31:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:17,952 INFO L225 Difference]: With dead ends: 50 [2020-12-09 07:31:17,952 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 07:31:17,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2020-12-09 07:31:17,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 07:31:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 38. [2020-12-09 07:31:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 07:31:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-12-09 07:31:17,955 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 16 [2020-12-09 07:31:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:17,955 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-12-09 07:31:17,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 07:31:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-12-09 07:31:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 07:31:17,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:17,956 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:31:18,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:31:18,158 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:31:18,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:18,159 INFO L82 PathProgramCache]: Analyzing trace with hash 2018398959, now seen corresponding path program 1 times [2020-12-09 07:31:18,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:18,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910130887] [2020-12-09 07:31:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 07:31:18,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910130887] [2020-12-09 07:31:18,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:31:18,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 07:31:18,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300375253] [2020-12-09 07:31:18,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 07:31:18,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:18,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 07:31:18,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:31:18,210 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 3 states. [2020-12-09 07:31:18,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:18,215 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-12-09 07:31:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 07:31:18,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-09 07:31:18,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:18,216 INFO L225 Difference]: With dead ends: 37 [2020-12-09 07:31:18,216 INFO L226 Difference]: Without dead ends: 37 [2020-12-09 07:31:18,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:31:18,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-09 07:31:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-09 07:31:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-09 07:31:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-12-09 07:31:18,218 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 17 [2020-12-09 07:31:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:18,219 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-12-09 07:31:18,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 07:31:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-12-09 07:31:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 07:31:18,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:18,219 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:31:18,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283 [2020-12-09 07:31:18,220 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:31:18,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:18,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1371266185, now seen corresponding path program 1 times [2020-12-09 07:31:18,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:18,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201443897] [2020-12-09 07:31:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:18,259 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:31:18,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201443897] [2020-12-09 07:31:18,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878576115] [2020-12-09 07:31:18,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:31:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:18,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 07:31:18,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:31:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 07:31:18,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:31:24,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 07:31:24,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [44629220] [2020-12-09 07:31:24,398 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-09 07:31:24,398 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:31:24,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:31:24,398 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:31:24,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:31:24,418 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:31:24,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-12-09 07:31:24,791 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:31:25,503 WARN L197 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 141 [2020-12-09 07:31:26,516 WARN L197 SmtUtils]: Spent 940.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 191 [2020-12-09 07:31:27,683 WARN L197 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 232 DAG size of output: 203 [2020-12-09 07:31:28,742 WARN L197 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 191 [2020-12-09 07:31:29,946 WARN L197 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 248 DAG size of output: 205 [2020-12-09 07:31:30,219 WARN L197 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 84 [2020-12-09 07:31:30,758 WARN L197 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 113 [2020-12-09 07:31:31,316 WARN L197 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 130 [2020-12-09 07:31:32,017 WARN L197 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 144 [2020-12-09 07:31:32,705 WARN L197 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 146 [2020-12-09 07:31:33,384 WARN L197 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 140 [2020-12-09 07:31:34,088 WARN L197 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 139 [2020-12-09 07:31:34,088 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:31:34,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:31:34,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2020-12-09 07:31:34,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072852633] [2020-12-09 07:31:34,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 07:31:34,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:34,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 07:31:34,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=336, Unknown=1, NotChecked=0, Total=420 [2020-12-09 07:31:34,090 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 9 states. [2020-12-09 07:31:34,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:34,141 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-12-09 07:31:34,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 07:31:34,141 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-12-09 07:31:34,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:34,142 INFO L225 Difference]: With dead ends: 23 [2020-12-09 07:31:34,142 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 07:31:34,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=99, Invalid=406, Unknown=1, NotChecked=0, Total=506 [2020-12-09 07:31:34,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 07:31:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-12-09 07:31:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 07:31:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-12-09 07:31:34,143 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-12-09 07:31:34,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:34,143 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-12-09 07:31:34,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 07:31:34,143 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-12-09 07:31:34,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 07:31:34,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:34,144 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:31:34,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:31:34,346 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2020-12-09 07:31:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:34,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1643814126, now seen corresponding path program 1 times [2020-12-09 07:31:34,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:34,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987049118] [2020-12-09 07:31:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 07:31:34,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987049118] [2020-12-09 07:31:34,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:31:34,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 07:31:34,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201368564] [2020-12-09 07:31:34,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 07:31:34,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:34,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 07:31:34,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 07:31:34,405 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 4 states. [2020-12-09 07:31:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:34,427 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-12-09 07:31:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 07:31:34,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-09 07:31:34,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:34,427 INFO L225 Difference]: With dead ends: 19 [2020-12-09 07:31:34,428 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 07:31:34,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 07:31:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 07:31:34,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 07:31:34,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 07:31:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 07:31:34,428 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-12-09 07:31:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:34,428 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 07:31:34,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 07:31:34,428 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 07:31:34,428 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 07:31:34,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2020-12-09 07:31:34,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:31:34 BoogieIcfgContainer [2020-12-09 07:31:34,432 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:31:34,432 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:31:34,432 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:31:34,432 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:31:34,433 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:30:47" (3/4) ... [2020-12-09 07:31:34,434 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 07:31:34,442 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 27 nodes and edges [2020-12-09 07:31:34,442 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2020-12-09 07:31:34,442 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-09 07:31:34,442 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 07:31:34,443 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 07:31:34,468 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_90d24d88-dfca-40a4-9a51-efafb73e1e82/bin/utaipan/witness.graphml [2020-12-09 07:31:34,468 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:31:34,469 INFO L168 Benchmark]: Toolchain (without parser) took 47867.29 ms. Allocated memory was 83.9 MB in the beginning and 159.4 MB in the end (delta: 75.5 MB). Free memory was 54.0 MB in the beginning and 100.4 MB in the end (delta: -46.4 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. [2020-12-09 07:31:34,469 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 83.9 MB. Free memory was 41.5 MB in the beginning and 41.4 MB in the end (delta: 54.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:31:34,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.92 ms. Allocated memory is still 83.9 MB. Free memory was 54.0 MB in the beginning and 59.7 MB in the end (delta: -5.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 07:31:34,469 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.91 ms. Allocated memory is still 83.9 MB. Free memory was 59.7 MB in the beginning and 57.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:31:34,470 INFO L168 Benchmark]: Boogie Preprocessor took 25.72 ms. Allocated memory is still 83.9 MB. Free memory was 57.7 MB in the beginning and 56.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:31:34,470 INFO L168 Benchmark]: RCFGBuilder took 470.65 ms. Allocated memory was 83.9 MB in the beginning and 109.1 MB in the end (delta: 25.2 MB). Free memory was 56.5 MB in the beginning and 61.1 MB in the end (delta: -4.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 16.1 GB. [2020-12-09 07:31:34,470 INFO L168 Benchmark]: TraceAbstraction took 47112.77 ms. Allocated memory was 109.1 MB in the beginning and 159.4 MB in the end (delta: 50.3 MB). Free memory was 61.1 MB in the beginning and 103.5 MB in the end (delta: -42.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2020-12-09 07:31:34,470 INFO L168 Benchmark]: Witness Printer took 36.24 ms. Allocated memory is still 159.4 MB. Free memory was 103.5 MB in the beginning and 100.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 07:31:34,472 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 83.9 MB. Free memory was 41.5 MB in the beginning and 41.4 MB in the end (delta: 54.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 178.92 ms. Allocated memory is still 83.9 MB. Free memory was 54.0 MB in the beginning and 59.7 MB in the end (delta: -5.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.91 ms. Allocated memory is still 83.9 MB. Free memory was 59.7 MB in the beginning and 57.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.72 ms. Allocated memory is still 83.9 MB. Free memory was 57.7 MB in the beginning and 56.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 470.65 ms. Allocated memory was 83.9 MB in the beginning and 109.1 MB in the end (delta: 25.2 MB). Free memory was 56.5 MB in the beginning and 61.1 MB in the end (delta: -4.7 MB). Peak memory consumption was 22.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 47112.77 ms. Allocated memory was 109.1 MB in the beginning and 159.4 MB in the end (delta: 50.3 MB). Free memory was 61.1 MB in the beginning and 103.5 MB in the end (delta: -42.4 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. * Witness Printer took 36.24 ms. Allocated memory is still 159.4 MB. Free memory was 103.5 MB in the beginning and 100.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 32]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 32]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 13]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 32]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 13]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 28]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 35]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 32]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 47]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 47]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 47]: free always succeeds For all program executions holds that free always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 18 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 41 locations, 18 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 47.0s, OverallIterations: 14, TraceHistogramMax: 2, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 364 SDtfs, 1238 SDslu, 506 SDs, 0 SdLazy, 734 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 332 GetRequests, 141 SyntacticMatches, 12 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 39.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=4, 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, 14 MinimizatonAttempts, 123 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.5s InterpolantComputationTime, 244 NumberOfCodeBlocks, 244 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 303 ConstructedInterpolants, 19 QuantifiedInterpolants, 54219 SizeOfPredicates, 132 NumberOfNonLiveVariables, 1095 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 28 InterpolantComputations, 9 PerfectInterpolantSequences, 32/83 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...