./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/scopes3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/scopes3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/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 7efcb16e512d7de15a71f6cd895dcd8493c4b646 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 16:14:31,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 16:14:31,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 16:14:31,839 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 16:14:31,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 16:14:31,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 16:14:31,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 16:14:31,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 16:14:31,844 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 16:14:31,845 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 16:14:31,846 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 16:14:31,847 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 16:14:31,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 16:14:31,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 16:14:31,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 16:14:31,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 16:14:31,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 16:14:31,851 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 16:14:31,853 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 16:14:31,854 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 16:14:31,855 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 16:14:31,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 16:14:31,856 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 16:14:31,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 16:14:31,859 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 16:14:31,859 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 16:14:31,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 16:14:31,859 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 16:14:31,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 16:14:31,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 16:14:31,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 16:14:31,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 16:14:31,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 16:14:31,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 16:14:31,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 16:14:31,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 16:14:31,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 16:14:31,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 16:14:31,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 16:14:31,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 16:14:31,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 16:14:31,866 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-12-07 16:14:31,880 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 16:14:31,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 16:14:31,881 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 16:14:31,881 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 16:14:31,882 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 16:14:31,882 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 16:14:31,882 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 16:14:31,882 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 16:14:31,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 16:14:31,883 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 16:14:31,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 16:14:31,883 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 16:14:31,883 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 16:14:31,883 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 16:14:31,884 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 16:14:31,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 16:14:31,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 16:14:31,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 16:14:31,885 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 16:14:31,885 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 16:14:31,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 16:14:31,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 16:14:31,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 16:14:31,886 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 16:14:31,886 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 16:14:31,886 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 16:14:31,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 16:14:31,886 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 16:14:31,886 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 16:14:31,887 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 16:14:31,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 16:14:31,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 16:14:31,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 16:14:31,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 16:14:31,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 16:14:31,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 16:14:31,888 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 16:14:31,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 16:14:31,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 16:14:31,888 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 16:14:31,888 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/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 -> 7efcb16e512d7de15a71f6cd895dcd8493c4b646 [2019-12-07 16:14:31,999 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 16:14:32,006 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 16:14:32,009 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 16:14:32,010 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 16:14:32,010 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 16:14:32,010 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/bin/utaipan/../../sv-benchmarks/c/memsafety-ext3/scopes3.c [2019-12-07 16:14:32,047 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/bin/utaipan/data/e71c68a38/321c02c5da6c406dbee2e67d514f74c1/FLAGfb673ddbd [2019-12-07 16:14:32,442 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 16:14:32,442 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/sv-benchmarks/c/memsafety-ext3/scopes3.c [2019-12-07 16:14:32,446 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/bin/utaipan/data/e71c68a38/321c02c5da6c406dbee2e67d514f74c1/FLAGfb673ddbd [2019-12-07 16:14:32,455 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/bin/utaipan/data/e71c68a38/321c02c5da6c406dbee2e67d514f74c1 [2019-12-07 16:14:32,457 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 16:14:32,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 16:14:32,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 16:14:32,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 16:14:32,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 16:14:32,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:14:32" (1/1) ... [2019-12-07 16:14:32,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@431cfabc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:14:32, skipping insertion in model container [2019-12-07 16:14:32,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 04:14:32" (1/1) ... [2019-12-07 16:14:32,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 16:14:32,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 16:14:32,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:14:32,632 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 16:14:32,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 16:14:32,655 INFO L208 MainTranslator]: Completed translation [2019-12-07 16:14:32,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:14:32 WrapperNode [2019-12-07 16:14:32,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 16:14:32,656 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 16:14:32,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 16:14:32,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 16:14:32,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:14:32" (1/1) ... [2019-12-07 16:14:32,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:14:32" (1/1) ... [2019-12-07 16:14:32,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 16:14:32,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 16:14:32,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 16:14:32,677 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 16:14:32,682 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:14:32" (1/1) ... [2019-12-07 16:14:32,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:14:32" (1/1) ... [2019-12-07 16:14:32,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:14:32" (1/1) ... [2019-12-07 16:14:32,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:14:32" (1/1) ... [2019-12-07 16:14:32,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:14:32" (1/1) ... [2019-12-07 16:14:32,688 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:14:32" (1/1) ... [2019-12-07 16:14:32,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:14:32" (1/1) ... [2019-12-07 16:14:32,690 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 16:14:32,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 16:14:32,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 16:14:32,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 16:14:32,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:14:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/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 [2019-12-07 16:14:32,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 16:14:32,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 16:14:32,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 16:14:32,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 16:14:32,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 16:14:32,864 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 16:14:32,864 INFO L287 CfgBuilder]: Removed 5 assume(true) statements. [2019-12-07 16:14:32,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:14:32 BoogieIcfgContainer [2019-12-07 16:14:32,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 16:14:32,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 16:14:32,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 16:14:32,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 16:14:32,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 04:14:32" (1/3) ... [2019-12-07 16:14:32,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66682007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:14:32, skipping insertion in model container [2019-12-07 16:14:32,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 04:14:32" (2/3) ... [2019-12-07 16:14:32,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66682007 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 04:14:32, skipping insertion in model container [2019-12-07 16:14:32,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:14:32" (3/3) ... [2019-12-07 16:14:32,870 INFO L109 eAbstractionObserver]: Analyzing ICFG scopes3.c [2019-12-07 16:14:32,877 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 16:14:32,881 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2019-12-07 16:14:32,888 INFO L249 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2019-12-07 16:14:32,900 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 16:14:32,900 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 16:14:32,900 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 16:14:32,900 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 16:14:32,900 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 16:14:32,900 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 16:14:32,900 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 16:14:32,900 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 16:14:32,909 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-12-07 16:14:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 16:14:32,913 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:14:32,914 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 16:14:32,914 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:14:32,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:14:32,918 INFO L82 PathProgramCache]: Analyzing trace with hash 56060, now seen corresponding path program 1 times [2019-12-07 16:14:32,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:14:32,924 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944540758] [2019-12-07 16:14:32,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:14:32,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:14:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:14:33,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944540758] [2019-12-07 16:14:33,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:14:33,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 16:14:33,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431592754] [2019-12-07 16:14:33,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 16:14:33,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:14:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 16:14:33,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:14:33,035 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 3 states. [2019-12-07 16:14:33,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:14:33,059 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2019-12-07 16:14:33,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 16:14:33,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-12-07 16:14:33,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:14:33,066 INFO L225 Difference]: With dead ends: 10 [2019-12-07 16:14:33,066 INFO L226 Difference]: Without dead ends: 9 [2019-12-07 16:14:33,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:14:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-12-07 16:14:33,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-12-07 16:14:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-12-07 16:14:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-12-07 16:14:33,087 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 3 [2019-12-07 16:14:33,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:14:33,088 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-12-07 16:14:33,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 16:14:33,088 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-12-07 16:14:33,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 16:14:33,088 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:14:33,088 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 16:14:33,088 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:14:33,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:14:33,089 INFO L82 PathProgramCache]: Analyzing trace with hash 56061, now seen corresponding path program 1 times [2019-12-07 16:14:33,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:14:33,089 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741512901] [2019-12-07 16:14:33,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:14:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:14:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:14:33,114 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741512901] [2019-12-07 16:14:33,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:14:33,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 16:14:33,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72151000] [2019-12-07 16:14:33,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 16:14:33,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:14:33,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 16:14:33,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:14:33,116 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2019-12-07 16:14:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:14:33,131 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-12-07 16:14:33,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 16:14:33,132 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-12-07 16:14:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:14:33,132 INFO L225 Difference]: With dead ends: 13 [2019-12-07 16:14:33,132 INFO L226 Difference]: Without dead ends: 13 [2019-12-07 16:14:33,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:14:33,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-12-07 16:14:33,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 10. [2019-12-07 16:14:33,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-12-07 16:14:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2019-12-07 16:14:33,135 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 3 [2019-12-07 16:14:33,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:14:33,135 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2019-12-07 16:14:33,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 16:14:33,136 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2019-12-07 16:14:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2019-12-07 16:14:33,136 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:14:33,136 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1] [2019-12-07 16:14:33,136 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:14:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:14:33,137 INFO L82 PathProgramCache]: Analyzing trace with hash 56719, now seen corresponding path program 1 times [2019-12-07 16:14:33,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:14:33,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898966895] [2019-12-07 16:14:33,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:14:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:14:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:14:33,147 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898966895] [2019-12-07 16:14:33,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 16:14:33,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 16:14:33,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147833665] [2019-12-07 16:14:33,147 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 16:14:33,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:14:33,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 16:14:33,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:14:33,148 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand 3 states. [2019-12-07 16:14:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:14:33,154 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-12-07 16:14:33,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 16:14:33,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2019-12-07 16:14:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:14:33,155 INFO L225 Difference]: With dead ends: 9 [2019-12-07 16:14:33,155 INFO L226 Difference]: Without dead ends: 9 [2019-12-07 16:14:33,156 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 16:14:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-12-07 16:14:33,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2019-12-07 16:14:33,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-12-07 16:14:33,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-12-07 16:14:33,157 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 3 [2019-12-07 16:14:33,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:14:33,157 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-12-07 16:14:33,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 16:14:33,157 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-12-07 16:14:33,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 16:14:33,157 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:14:33,157 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 16:14:33,158 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:14:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:14:33,158 INFO L82 PathProgramCache]: Analyzing trace with hash 53890017, now seen corresponding path program 1 times [2019-12-07 16:14:33,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:14:33,158 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577465136] [2019-12-07 16:14:33,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:14:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:14:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:14:33,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577465136] [2019-12-07 16:14:33,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504791105] [2019-12-07 16:14:33,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/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 [2019-12-07 16:14:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:14:33,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 16:14:33,207 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:14:33,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:14:33,224 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 16:14:33,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:14:33,236 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [649696743] [2019-12-07 16:14:33,251 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-12-07 16:14:33,251 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 16:14:33,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 16:14:33,259 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 16:14:33,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 16:14:33,528 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 16:14:33,557 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 16:14:33,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 16:14:33,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2019-12-07 16:14:33,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345721544] [2019-12-07 16:14:33,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 16:14:33,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:14:33,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 16:14:33,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-12-07 16:14:33,559 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2019-12-07 16:14:33,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:14:33,578 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-12-07 16:14:33,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 16:14:33,578 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2019-12-07 16:14:33,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:14:33,579 INFO L225 Difference]: With dead ends: 14 [2019-12-07 16:14:33,579 INFO L226 Difference]: Without dead ends: 14 [2019-12-07 16:14:33,579 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-12-07 16:14:33,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-12-07 16:14:33,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-12-07 16:14:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-12-07 16:14:33,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-12-07 16:14:33,581 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 5 [2019-12-07 16:14:33,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:14:33,581 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-12-07 16:14:33,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 16:14:33,581 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-12-07 16:14:33,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-12-07 16:14:33,581 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:14:33,581 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1] [2019-12-07 16:14:33,782 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:14:33,782 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:14:33,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:14:33,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1757760471, now seen corresponding path program 2 times [2019-12-07 16:14:33,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:14:33,783 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433320151] [2019-12-07 16:14:33,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:14:33,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 16:14:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:14:33,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433320151] [2019-12-07 16:14:33,883 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891588966] [2019-12-07 16:14:33,883 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/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 [2019-12-07 16:14:33,949 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-12-07 16:14:33,949 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 16:14:33,950 INFO L264 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2019-12-07 16:14:33,951 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 16:14:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:14:33,960 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 16:14:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 16:14:33,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424265828] [2019-12-07 16:14:34,000 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2019-12-07 16:14:34,000 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 16:14:34,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 16:14:34,000 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 16:14:34,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 16:14:34,184 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 16:14:34,222 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 16:14:34,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 16:14:34,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2019-12-07 16:14:34,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464407016] [2019-12-07 16:14:34,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-12-07 16:14:34,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 16:14:34,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-12-07 16:14:34,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-07 16:14:34,224 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2019-12-07 16:14:34,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 16:14:34,264 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-12-07 16:14:34,264 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 16:14:34,265 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2019-12-07 16:14:34,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 16:14:34,265 INFO L225 Difference]: With dead ends: 26 [2019-12-07 16:14:34,265 INFO L226 Difference]: Without dead ends: 26 [2019-12-07 16:14:34,266 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2019-12-07 16:14:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-12-07 16:14:34,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-12-07 16:14:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-12-07 16:14:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-12-07 16:14:34,269 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 11 [2019-12-07 16:14:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 16:14:34,269 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-12-07 16:14:34,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-12-07 16:14:34,270 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-12-07 16:14:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-12-07 16:14:34,270 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 16:14:34,270 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1] [2019-12-07 16:14:34,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 16:14:34,471 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 16:14:34,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 16:14:34,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1275509315, now seen corresponding path program 3 times [2019-12-07 16:14:34,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 16:14:34,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237767805] [2019-12-07 16:14:34,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 16:14:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:14:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 16:14:34,557 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-12-07 16:14:34,557 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-12-07 16:14:34,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 04:14:34 BoogieIcfgContainer [2019-12-07 16:14:34,578 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 16:14:34,578 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 16:14:34,578 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 16:14:34,578 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 16:14:34,578 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 04:14:32" (3/4) ... [2019-12-07 16:14:34,580 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-12-07 16:14:34,615 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_e8e77aa1-e889-4a0d-adbd-be1dd59296f1/bin/utaipan/witness.graphml [2019-12-07 16:14:34,615 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 16:14:34,616 INFO L168 Benchmark]: Toolchain (without parser) took 2158.84 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 84.9 MB). Free memory was 944.7 MB in the beginning and 852.5 MB in the end (delta: 92.3 MB). Peak memory consumption was 177.2 MB. Max. memory is 11.5 GB. [2019-12-07 16:14:34,616 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:14:34,617 INFO L168 Benchmark]: CACSL2BoogieTranslator took 197.18 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 84.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -135.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-12-07 16:14:34,617 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.97 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:14:34,617 INFO L168 Benchmark]: Boogie Preprocessor took 13.37 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:14:34,617 INFO L168 Benchmark]: RCFGBuilder took 175.32 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. [2019-12-07 16:14:34,618 INFO L168 Benchmark]: TraceAbstraction took 1711.52 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 857.8 MB in the end (delta: 199.6 MB). Peak memory consumption was 199.6 MB. Max. memory is 11.5 GB. [2019-12-07 16:14:34,618 INFO L168 Benchmark]: Witness Printer took 37.50 ms. Allocated memory is still 1.1 GB. Free memory is still 857.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 16:14:34,619 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 960.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 197.18 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 84.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -135.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 20.97 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.37 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 175.32 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1711.52 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 857.8 MB in the end (delta: 199.6 MB). Peak memory consumption was 199.6 MB. Max. memory is 11.5 GB. * Witness Printer took 37.50 ms. Allocated memory is still 1.1 GB. Free memory is still 857.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a [L6] p[0] = 1 [L3] i++ [L3] COND FALSE !(i < 10) [L8] p[0] = 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 5 error locations. Result: UNSAFE, OverallTime: 1.6s, OverallIterations: 6, TraceHistogramMax: 10, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 23 SDslu, 21 SDs, 0 SdLazy, 60 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=5, 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, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 64 NumberOfCodeBlocks, 64 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 1000 SizeOfPredicates, 2 NumberOfNonLiveVariables, 131 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 0/51 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...