./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.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_481b56d3-6df3-49be-8d75-e26bfa90e44d/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c -s /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/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 56b28f59847d63942ec468b0c95f39e5b8c0763a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 12:17:26,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 12:17:26,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 12:17:26,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 12:17:26,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 12:17:26,814 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 12:17:26,815 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 12:17:26,816 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 12:17:26,818 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 12:17:26,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 12:17:26,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 12:17:26,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 12:17:26,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 12:17:26,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 12:17:26,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 12:17:26,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 12:17:26,822 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 12:17:26,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 12:17:26,824 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 12:17:26,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 12:17:26,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 12:17:26,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 12:17:26,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 12:17:26,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 12:17:26,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 12:17:26,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 12:17:26,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 12:17:26,831 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 12:17:26,831 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 12:17:26,832 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 12:17:26,832 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 12:17:26,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 12:17:26,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 12:17:26,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 12:17:26,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 12:17:26,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 12:17:26,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 12:17:26,834 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 12:17:26,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 12:17:26,835 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 12:17:26,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 12:17:26,836 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2019-12-07 12:17:26,846 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 12:17:26,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 12:17:26,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-12-07 12:17:26,847 INFO L138 SettingsManager]: * User list type=DISABLED [2019-12-07 12:17:26,847 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-12-07 12:17:26,847 INFO L138 SettingsManager]: * Explicit value domain=true [2019-12-07 12:17:26,847 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-12-07 12:17:26,847 INFO L138 SettingsManager]: * Octagon Domain=false [2019-12-07 12:17:26,848 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-12-07 12:17:26,848 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-12-07 12:17:26,848 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-12-07 12:17:26,848 INFO L138 SettingsManager]: * Interval Domain=false [2019-12-07 12:17:26,848 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-12-07 12:17:26,848 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-12-07 12:17:26,848 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-12-07 12:17:26,849 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 12:17:26,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 12:17:26,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 12:17:26,849 INFO L138 SettingsManager]: * sizeof long=4 [2019-12-07 12:17:26,849 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 12:17:26,849 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 12:17:26,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-12-07 12:17:26,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 12:17:26,850 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-12-07 12:17:26,850 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-12-07 12:17:26,850 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-12-07 12:17:26,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-12-07 12:17:26,850 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-12-07 12:17:26,850 INFO L138 SettingsManager]: * sizeof long double=12 [2019-12-07 12:17:26,850 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 12:17:26,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 12:17:26,851 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-12-07 12:17:26,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-12-07 12:17:26,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-12-07 12:17:26,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 12:17:26,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-12-07 12:17:26,851 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-12-07 12:17:26,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-12-07 12:17:26,852 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 12:17:26,852 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-12-07 12:17:26,852 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_481b56d3-6df3-49be-8d75-e26bfa90e44d/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 -> 56b28f59847d63942ec468b0c95f39e5b8c0763a [2019-12-07 12:17:26,950 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 12:17:26,958 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 12:17:26,960 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 12:17:26,962 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 12:17:26,962 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 12:17:26,963 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/bin/utaipan/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2019-12-07 12:17:27,007 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/bin/utaipan/data/5688dd769/8618a07a41304071a5115387a0b0e37e/FLAGd3016f267 [2019-12-07 12:17:27,452 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 12:17:27,452 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration.c [2019-12-07 12:17:27,456 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/bin/utaipan/data/5688dd769/8618a07a41304071a5115387a0b0e37e/FLAGd3016f267 [2019-12-07 12:17:27,464 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/bin/utaipan/data/5688dd769/8618a07a41304071a5115387a0b0e37e [2019-12-07 12:17:27,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 12:17:27,466 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 12:17:27,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 12:17:27,467 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 12:17:27,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 12:17:27,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:17:27" (1/1) ... [2019-12-07 12:17:27,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48b8aa41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:17:27, skipping insertion in model container [2019-12-07 12:17:27,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:17:27" (1/1) ... [2019-12-07 12:17:27,476 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 12:17:27,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 12:17:27,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:17:27,625 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 12:17:27,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 12:17:27,645 INFO L208 MainTranslator]: Completed translation [2019-12-07 12:17:27,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:17:27 WrapperNode [2019-12-07 12:17:27,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 12:17:27,646 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 12:17:27,646 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 12:17:27,646 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 12:17:27,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:17:27" (1/1) ... [2019-12-07 12:17:27,657 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:17:27" (1/1) ... [2019-12-07 12:17:27,669 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 12:17:27,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 12:17:27,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 12:17:27,670 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 12:17:27,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:17:27" (1/1) ... [2019-12-07 12:17:27,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:17:27" (1/1) ... [2019-12-07 12:17:27,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:17:27" (1/1) ... [2019-12-07 12:17:27,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:17:27" (1/1) ... [2019-12-07 12:17:27,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:17:27" (1/1) ... [2019-12-07 12:17:27,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:17:27" (1/1) ... [2019-12-07 12:17:27,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:17:27" (1/1) ... [2019-12-07 12:17:27,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 12:17:27,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 12:17:27,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 12:17:27,686 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 12:17:27,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:17:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/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 12:17:27,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-12-07 12:17:27,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 12:17:27,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 12:17:27,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-12-07 12:17:27,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-12-07 12:17:27,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-12-07 12:17:27,935 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 12:17:27,935 INFO L287 CfgBuilder]: Removed 9 assume(true) statements. [2019-12-07 12:17:27,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:17:27 BoogieIcfgContainer [2019-12-07 12:17:27,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 12:17:27,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-12-07 12:17:27,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-12-07 12:17:27,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-12-07 12:17:27,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:17:27" (1/3) ... [2019-12-07 12:17:27,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1388006b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:17:27, skipping insertion in model container [2019-12-07 12:17:27,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:17:27" (2/3) ... [2019-12-07 12:17:27,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1388006b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:17:27, skipping insertion in model container [2019-12-07 12:17:27,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:17:27" (3/3) ... [2019-12-07 12:17:27,942 INFO L109 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration.c [2019-12-07 12:17:27,949 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-12-07 12:17:27,953 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2019-12-07 12:17:27,960 INFO L249 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2019-12-07 12:17:27,972 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-12-07 12:17:27,972 INFO L374 AbstractCegarLoop]: Hoare is false [2019-12-07 12:17:27,972 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-12-07 12:17:27,972 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 12:17:27,973 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 12:17:27,973 INFO L378 AbstractCegarLoop]: Difference is false [2019-12-07 12:17:27,973 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 12:17:27,973 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-12-07 12:17:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-12-07 12:17:27,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 12:17:27,986 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:27,986 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 12:17:27,987 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:27,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:27,990 INFO L82 PathProgramCache]: Analyzing trace with hash 3150815, now seen corresponding path program 1 times [2019-12-07 12:17:27,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:27,997 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994285031] [2019-12-07 12:17:27,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:28,095 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 12:17:28,095 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994285031] [2019-12-07 12:17:28,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:17:28,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 12:17:28,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089022139] [2019-12-07 12:17:28,099 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 12:17:28,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:28,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 12:17:28,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 12:17:28,110 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2019-12-07 12:17:28,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:28,148 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2019-12-07 12:17:28,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 12:17:28,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 12:17:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:28,155 INFO L225 Difference]: With dead ends: 37 [2019-12-07 12:17:28,155 INFO L226 Difference]: Without dead ends: 35 [2019-12-07 12:17:28,156 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 12:17:28,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-12-07 12:17:28,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2019-12-07 12:17:28,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-12-07 12:17:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-12-07 12:17:28,177 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 4 [2019-12-07 12:17:28,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:28,177 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-12-07 12:17:28,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 12:17:28,178 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-12-07 12:17:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 12:17:28,178 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:28,178 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 12:17:28,178 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:28,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:28,178 INFO L82 PathProgramCache]: Analyzing trace with hash 3078660, now seen corresponding path program 1 times [2019-12-07 12:17:28,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:28,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149159325] [2019-12-07 12:17:28,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:28,200 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 12:17:28,201 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149159325] [2019-12-07 12:17:28,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:17:28,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 12:17:28,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962895033] [2019-12-07 12:17:28,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 12:17:28,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:28,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 12:17:28,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 12:17:28,202 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2019-12-07 12:17:28,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:28,217 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2019-12-07 12:17:28,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 12:17:28,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-12-07 12:17:28,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:28,218 INFO L225 Difference]: With dead ends: 37 [2019-12-07 12:17:28,218 INFO L226 Difference]: Without dead ends: 37 [2019-12-07 12:17:28,219 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 12:17:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-12-07 12:17:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2019-12-07 12:17:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 12:17:28,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-12-07 12:17:28,222 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 4 [2019-12-07 12:17:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:28,222 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-12-07 12:17:28,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 12:17:28,222 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-12-07 12:17:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-12-07 12:17:28,222 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:28,222 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-12-07 12:17:28,222 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:28,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:28,223 INFO L82 PathProgramCache]: Analyzing trace with hash 3080752, now seen corresponding path program 1 times [2019-12-07 12:17:28,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:28,223 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785054936] [2019-12-07 12:17:28,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:28,252 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 12:17:28,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785054936] [2019-12-07 12:17:28,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:17:28,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 12:17:28,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356469424] [2019-12-07 12:17:28,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 12:17:28,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:28,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 12:17:28,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 12:17:28,254 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 4 states. [2019-12-07 12:17:28,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:28,301 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2019-12-07 12:17:28,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 12:17:28,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-12-07 12:17:28,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:28,302 INFO L225 Difference]: With dead ends: 42 [2019-12-07 12:17:28,302 INFO L226 Difference]: Without dead ends: 42 [2019-12-07 12:17:28,303 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 12:17:28,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-12-07 12:17:28,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 23. [2019-12-07 12:17:28,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 12:17:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-12-07 12:17:28,307 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 4 [2019-12-07 12:17:28,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:28,307 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-12-07 12:17:28,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 12:17:28,307 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-12-07 12:17:28,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 12:17:28,307 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:28,308 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 12:17:28,308 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:28,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:28,308 INFO L82 PathProgramCache]: Analyzing trace with hash 95438513, now seen corresponding path program 1 times [2019-12-07 12:17:28,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:28,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225164260] [2019-12-07 12:17:28,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:28,335 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 12:17:28,335 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225164260] [2019-12-07 12:17:28,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:17:28,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-12-07 12:17:28,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653699123] [2019-12-07 12:17:28,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-12-07 12:17:28,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:28,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-12-07 12:17:28,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-12-07 12:17:28,336 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 4 states. [2019-12-07 12:17:28,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:28,358 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2019-12-07 12:17:28,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 12:17:28,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2019-12-07 12:17:28,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:28,358 INFO L225 Difference]: With dead ends: 22 [2019-12-07 12:17:28,359 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 12:17:28,359 INFO L630 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 [2019-12-07 12:17:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 12:17:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-12-07 12:17:28,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 12:17:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-12-07 12:17:28,361 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 5 [2019-12-07 12:17:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:28,361 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-12-07 12:17:28,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-12-07 12:17:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-12-07 12:17:28,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-12-07 12:17:28,362 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:28,362 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-12-07 12:17:28,362 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:28,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:28,362 INFO L82 PathProgramCache]: Analyzing trace with hash 95438514, now seen corresponding path program 1 times [2019-12-07 12:17:28,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:28,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522450459] [2019-12-07 12:17:28,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:28,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:28,399 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 12:17:28,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522450459] [2019-12-07 12:17:28,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:17:28,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 12:17:28,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420964582] [2019-12-07 12:17:28,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 12:17:28,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:28,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 12:17:28,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-12-07 12:17:28,400 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 5 states. [2019-12-07 12:17:28,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:28,463 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2019-12-07 12:17:28,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 12:17:28,464 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2019-12-07 12:17:28,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:28,464 INFO L225 Difference]: With dead ends: 33 [2019-12-07 12:17:28,464 INFO L226 Difference]: Without dead ends: 33 [2019-12-07 12:17:28,465 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-12-07 12:17:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-12-07 12:17:28,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2019-12-07 12:17:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-12-07 12:17:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-12-07 12:17:28,467 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 5 [2019-12-07 12:17:28,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:28,467 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-12-07 12:17:28,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 12:17:28,467 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-12-07 12:17:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 12:17:28,467 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:28,468 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-12-07 12:17:28,468 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:28,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1522149287, now seen corresponding path program 1 times [2019-12-07 12:17:28,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:28,468 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960567442] [2019-12-07 12:17:28,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:17:28,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960567442] [2019-12-07 12:17:28,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:17:28,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-12-07 12:17:28,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148983087] [2019-12-07 12:17:28,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 12:17:28,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:28,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 12:17:28,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-12-07 12:17:28,505 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 6 states. [2019-12-07 12:17:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:28,556 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2019-12-07 12:17:28,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 12:17:28,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-12-07 12:17:28,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:28,557 INFO L225 Difference]: With dead ends: 48 [2019-12-07 12:17:28,557 INFO L226 Difference]: Without dead ends: 48 [2019-12-07 12:17:28,557 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-12-07 12:17:28,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-12-07 12:17:28,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 24. [2019-12-07 12:17:28,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 12:17:28,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-12-07 12:17:28,560 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2019-12-07 12:17:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:28,561 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-12-07 12:17:28,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 12:17:28,561 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-12-07 12:17:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 12:17:28,561 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:28,561 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:17:28,561 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:28,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:28,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1522151379, now seen corresponding path program 1 times [2019-12-07 12:17:28,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:28,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207027150] [2019-12-07 12:17:28,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:28,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 12:17:28,599 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207027150] [2019-12-07 12:17:28,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:17:28,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-12-07 12:17:28,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466532328] [2019-12-07 12:17:28,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-12-07 12:17:28,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:28,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-12-07 12:17:28,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-12-07 12:17:28,601 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2019-12-07 12:17:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:28,615 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2019-12-07 12:17:28,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 12:17:28,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2019-12-07 12:17:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:28,616 INFO L225 Difference]: With dead ends: 22 [2019-12-07 12:17:28,616 INFO L226 Difference]: Without dead ends: 22 [2019-12-07 12:17:28,616 INFO L630 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 [2019-12-07 12:17:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-12-07 12:17:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-12-07 12:17:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-12-07 12:17:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-12-07 12:17:28,619 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 7 [2019-12-07 12:17:28,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:28,619 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-12-07 12:17:28,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-12-07 12:17:28,619 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-12-07 12:17:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-12-07 12:17:28,620 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:28,620 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:17:28,620 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:28,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:28,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1522151380, now seen corresponding path program 1 times [2019-12-07 12:17:28,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:28,621 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387870562] [2019-12-07 12:17:28,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:17:28,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387870562] [2019-12-07 12:17:28,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 12:17:28,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2019-12-07 12:17:28,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505535641] [2019-12-07 12:17:28,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-12-07 12:17:28,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:28,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-12-07 12:17:28,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-12-07 12:17:28,653 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2019-12-07 12:17:28,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:28,670 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2019-12-07 12:17:28,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-12-07 12:17:28,670 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-12-07 12:17:28,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:28,671 INFO L225 Difference]: With dead ends: 23 [2019-12-07 12:17:28,671 INFO L226 Difference]: Without dead ends: 23 [2019-12-07 12:17:28,671 INFO L630 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 [2019-12-07 12:17:28,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-12-07 12:17:28,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-12-07 12:17:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-12-07 12:17:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-12-07 12:17:28,674 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 7 [2019-12-07 12:17:28,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:28,674 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-12-07 12:17:28,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-12-07 12:17:28,674 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-12-07 12:17:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-12-07 12:17:28,674 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:28,675 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:17:28,675 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:28,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:28,675 INFO L82 PathProgramCache]: Analyzing trace with hash 148383000, now seen corresponding path program 1 times [2019-12-07 12:17:28,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:28,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093664263] [2019-12-07 12:17:28,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:17:28,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093664263] [2019-12-07 12:17:28,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639054115] [2019-12-07 12:17:28,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/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 12:17:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:28,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 12:17:28,737 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:17:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:17:28,757 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:17:28,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:17:28,769 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1685100648] [2019-12-07 12:17:28,784 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2019-12-07 12:17:28,784 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:17:28,788 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:17:28,792 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:17:28,792 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:17:28,903 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:29,035 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:29,071 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:29,483 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:17:29,800 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2019-12-07 12:17:30,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:17:30,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 3, 3] total 12 [2019-12-07 12:17:30,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049216366] [2019-12-07 12:17:30,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-12-07 12:17:30,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:30,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-12-07 12:17:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2019-12-07 12:17:30,141 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 8 states. [2019-12-07 12:17:30,346 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81 [2019-12-07 12:17:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:30,412 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2019-12-07 12:17:30,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-12-07 12:17:30,412 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-12-07 12:17:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:30,413 INFO L225 Difference]: With dead ends: 25 [2019-12-07 12:17:30,413 INFO L226 Difference]: Without dead ends: 25 [2019-12-07 12:17:30,413 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-12-07 12:17:30,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-12-07 12:17:30,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-12-07 12:17:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-12-07 12:17:30,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-12-07 12:17:30,415 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2019-12-07 12:17:30,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:30,415 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-12-07 12:17:30,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-12-07 12:17:30,416 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-12-07 12:17:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-12-07 12:17:30,416 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:30,416 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 12:17:30,616 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:17:30,617 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:30,617 INFO L82 PathProgramCache]: Analyzing trace with hash 862142579, now seen corresponding path program 1 times [2019-12-07 12:17:30,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:30,617 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548723616] [2019-12-07 12:17:30,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:17:30,644 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548723616] [2019-12-07 12:17:30,645 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567969107] [2019-12-07 12:17:30,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/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 12:17:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:30,673 INFO L264 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-12-07 12:17:30,674 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:17:30,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:17:30,679 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:17:30,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:17:30,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1968737916] [2019-12-07 12:17:30,689 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-12-07 12:17:30,689 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:17:30,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:17:30,690 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:17:30,690 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:17:30,741 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:30,821 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:30,852 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:31,159 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:31,176 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:17:31,445 WARN L192 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2019-12-07 12:17:31,865 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 12:17:31,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:17:31,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2019-12-07 12:17:31,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25924793] [2019-12-07 12:17:31,865 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-12-07 12:17:31,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:31,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-12-07 12:17:31,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-07 12:17:31,866 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 7 states. [2019-12-07 12:17:31,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:31,901 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2019-12-07 12:17:31,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-12-07 12:17:31,902 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2019-12-07 12:17:31,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:31,902 INFO L225 Difference]: With dead ends: 61 [2019-12-07 12:17:31,902 INFO L226 Difference]: Without dead ends: 61 [2019-12-07 12:17:31,902 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2019-12-07 12:17:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-12-07 12:17:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2019-12-07 12:17:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-12-07 12:17:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2019-12-07 12:17:31,906 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 12 [2019-12-07 12:17:31,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:31,906 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2019-12-07 12:17:31,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-12-07 12:17:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2019-12-07 12:17:31,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 12:17:31,906 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:31,906 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2019-12-07 12:17:32,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:17:32,107 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:32,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:32,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1163785730, now seen corresponding path program 1 times [2019-12-07 12:17:32,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:32,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078448302] [2019-12-07 12:17:32,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 12:17:32,167 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078448302] [2019-12-07 12:17:32,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323167161] [2019-12-07 12:17:32,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/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 [2019-12-07 12:17:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:32,191 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 12:17:32,191 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:17:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 12:17:32,201 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:17:32,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 12:17:32,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2104423318] [2019-12-07 12:17:32,214 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 12:17:32,215 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:17:32,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:17:32,215 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:17:32,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:17:32,249 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:32,304 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:32,324 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:32,455 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:32,565 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:17:32,988 WARN L192 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2019-12-07 12:17:33,284 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 12:17:33,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:17:33,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2019-12-07 12:17:33,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456001593] [2019-12-07 12:17:33,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 12:17:33,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:33,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 12:17:33,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-12-07 12:17:33,285 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand 10 states. [2019-12-07 12:17:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:33,348 INFO L93 Difference]: Finished difference Result 139 states and 187 transitions. [2019-12-07 12:17:33,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 12:17:33,349 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-07 12:17:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:33,350 INFO L225 Difference]: With dead ends: 139 [2019-12-07 12:17:33,351 INFO L226 Difference]: Without dead ends: 139 [2019-12-07 12:17:33,351 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2019-12-07 12:17:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-12-07 12:17:33,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 43. [2019-12-07 12:17:33,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-12-07 12:17:33,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions. [2019-12-07 12:17:33,357 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 13 [2019-12-07 12:17:33,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:33,357 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 55 transitions. [2019-12-07 12:17:33,357 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 12:17:33,357 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions. [2019-12-07 12:17:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-12-07 12:17:33,358 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:33,358 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2019-12-07 12:17:33,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:17:33,559 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:33,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:33,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1163783637, now seen corresponding path program 1 times [2019-12-07 12:17:33,560 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:33,560 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559872790] [2019-12-07 12:17:33,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:17:33,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559872790] [2019-12-07 12:17:33,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288421040] [2019-12-07 12:17:33,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/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 [2019-12-07 12:17:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:33,645 INFO L264 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 12:17:33,645 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:17:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:17:33,673 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:17:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-12-07 12:17:33,691 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1556524199] [2019-12-07 12:17:33,691 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 12:17:33,692 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:17:33,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:17:33,692 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:17:33,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:17:33,732 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:33,791 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:33,811 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:34,029 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:17:34,389 WARN L192 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2019-12-07 12:17:34,516 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2019-12-07 12:17:34,711 WARN L192 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2019-12-07 12:17:34,945 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2019-12-07 12:17:35,201 WARN L192 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2019-12-07 12:17:35,203 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 12:17:35,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:17:35,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2019-12-07 12:17:35,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659378131] [2019-12-07 12:17:35,204 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-12-07 12:17:35,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:35,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 12:17:35,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-12-07 12:17:35,205 INFO L87 Difference]: Start difference. First operand 43 states and 55 transitions. Second operand 10 states. [2019-12-07 12:17:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:35,440 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2019-12-07 12:17:35,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 12:17:35,440 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2019-12-07 12:17:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:35,441 INFO L225 Difference]: With dead ends: 60 [2019-12-07 12:17:35,441 INFO L226 Difference]: Without dead ends: 60 [2019-12-07 12:17:35,441 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-12-07 12:17:35,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-12-07 12:17:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 52. [2019-12-07 12:17:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-12-07 12:17:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 64 transitions. [2019-12-07 12:17:35,444 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 64 transitions. Word has length 13 [2019-12-07 12:17:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:35,444 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 64 transitions. [2019-12-07 12:17:35,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-12-07 12:17:35,444 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 64 transitions. [2019-12-07 12:17:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-12-07 12:17:35,445 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:35,445 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1] [2019-12-07 12:17:35,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:17:35,646 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:35,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:35,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1364564582, now seen corresponding path program 2 times [2019-12-07 12:17:35,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:35,647 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813733963] [2019-12-07 12:17:35,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 12:17:35,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813733963] [2019-12-07 12:17:35,732 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747474744] [2019-12-07 12:17:35,732 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/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 [2019-12-07 12:17:35,757 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-12-07 12:17:35,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:17:35,758 INFO L264 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 12:17:35,759 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:17:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 12:17:35,803 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:17:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-12-07 12:17:35,821 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305488842] [2019-12-07 12:17:35,822 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-12-07 12:17:35,822 INFO L166 IcfgInterpreter]: Building call graph [2019-12-07 12:17:35,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-12-07 12:17:35,822 INFO L176 IcfgInterpreter]: Starting interpretation [2019-12-07 12:17:35,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-12-07 12:17:35,853 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:35,905 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:35,924 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-12-07 12:17:36,130 INFO L180 IcfgInterpreter]: Interpretation finished [2019-12-07 12:17:36,479 WARN L192 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2019-12-07 12:17:36,844 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-12-07 12:17:36,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-12-07 12:17:36,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2019-12-07 12:17:36,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632462000] [2019-12-07 12:17:36,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-12-07 12:17:36,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:36,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-12-07 12:17:36,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-12-07 12:17:36,845 INFO L87 Difference]: Start difference. First operand 52 states and 64 transitions. Second operand 9 states. [2019-12-07 12:17:36,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:36,983 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-12-07 12:17:36,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-12-07 12:17:36,984 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-12-07 12:17:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:36,984 INFO L225 Difference]: With dead ends: 50 [2019-12-07 12:17:36,984 INFO L226 Difference]: Without dead ends: 50 [2019-12-07 12:17:36,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2019-12-07 12:17:36,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-12-07 12:17:36,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-12-07 12:17:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-12-07 12:17:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2019-12-07 12:17:36,986 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2019-12-07 12:17:36,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:36,987 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2019-12-07 12:17:36,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-12-07 12:17:36,987 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2019-12-07 12:17:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-12-07 12:17:36,987 INFO L402 BasicCegarLoop]: Found error trace [2019-12-07 12:17:36,988 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2019-12-07 12:17:37,188 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:17:37,189 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2019-12-07 12:17:37,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 12:17:37,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1364720339, now seen corresponding path program 2 times [2019-12-07 12:17:37,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-12-07 12:17:37,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233141860] [2019-12-07 12:17:37,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 12:17:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 12:17:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-12-07 12:17:37,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233141860] [2019-12-07 12:17:37,255 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173614715] [2019-12-07 12:17:37,256 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/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 [2019-12-07 12:17:37,277 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-12-07 12:17:37,278 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 12:17:37,278 INFO L264 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 12:17:37,279 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 12:17:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-12-07 12:17:37,418 INFO L329 TraceCheckSpWp]: Computing backward predicates... [2019-12-07 12:17:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-12-07 12:17:37,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-12-07 12:17:37,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6] total 10 [2019-12-07 12:17:37,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255693554] [2019-12-07 12:17:37,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-12-07 12:17:37,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-12-07 12:17:37,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 12:17:37,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-12-07 12:17:37,439 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 6 states. [2019-12-07 12:17:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 12:17:37,500 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2019-12-07 12:17:37,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-12-07 12:17:37,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2019-12-07 12:17:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-12-07 12:17:37,501 INFO L225 Difference]: With dead ends: 49 [2019-12-07 12:17:37,501 INFO L226 Difference]: Without dead ends: 0 [2019-12-07 12:17:37,501 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-12-07 12:17:37,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-12-07 12:17:37,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-12-07 12:17:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-12-07 12:17:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-12-07 12:17:37,501 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2019-12-07 12:17:37,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-12-07 12:17:37,502 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 12:17:37,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-12-07 12:17:37,502 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-12-07 12:17:37,502 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-12-07 12:17:37,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 12:17:37,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:17:37 BoogieIcfgContainer [2019-12-07 12:17:37,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-12-07 12:17:37,715 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 12:17:37,715 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 12:17:37,716 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 12:17:37,717 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:17:27" (3/4) ... [2019-12-07 12:17:37,724 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-12-07 12:17:37,745 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2019-12-07 12:17:37,746 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2019-12-07 12:17:37,746 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-12-07 12:17:37,777 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_481b56d3-6df3-49be-8d75-e26bfa90e44d/bin/utaipan/witness.graphml [2019-12-07 12:17:37,777 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 12:17:37,778 INFO L168 Benchmark]: Toolchain (without parser) took 10311.47 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 248.5 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -133.9 MB). Peak memory consumption was 114.6 MB. Max. memory is 11.5 GB. [2019-12-07 12:17:37,778 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 12:17:37,778 INFO L168 Benchmark]: CACSL2BoogieTranslator took 178.78 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -153.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. [2019-12-07 12:17:37,778 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.96 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 12:17:37,779 INFO L168 Benchmark]: Boogie Preprocessor took 15.45 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 12:17:37,779 INFO L168 Benchmark]: RCFGBuilder took 250.58 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: 32.6 MB). Peak memory consumption was 32.6 MB. Max. memory is 11.5 GB. [2019-12-07 12:17:37,779 INFO L168 Benchmark]: TraceAbstraction took 9778.06 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 141.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -15.9 MB). Peak memory consumption was 125.1 MB. Max. memory is 11.5 GB. [2019-12-07 12:17:37,779 INFO L168 Benchmark]: Witness Printer took 61.60 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. [2019-12-07 12:17:37,781 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 178.78 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 107.5 MB). Free memory was 948.9 MB in the beginning and 1.1 GB in the end (delta: -153.4 MB). Peak memory consumption was 24.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 22.96 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 15.45 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 250.58 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: 32.6 MB). Peak memory consumption was 32.6 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9778.06 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 141.0 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -15.9 MB). Peak memory consumption was 125.1 MB. Max. memory is 11.5 GB. * Witness Printer took 61.60 ms. Allocated memory is still 1.3 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 23]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 18]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: 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 - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Result: SAFE, OverallTime: 9.7s, OverallIterations: 14, TraceHistogramMax: 7, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 596 SDslu, 197 SDs, 0 SdLazy, 504 SolverSat, 101 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 329 GetRequests, 210 SyntacticMatches, 5 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=12, 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, 204 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 249 NumberOfCodeBlocks, 210 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 326 ConstructedInterpolants, 16 QuantifiedInterpolants, 85079 SizeOfPredicates, 5 NumberOfNonLiveVariables, 457 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 26 InterpolantComputations, 10 PerfectInterpolantSequences, 307/472 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: OVERALL_TIME[ms]: 700, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 12, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 33, TOOLS_POST_TIME[ms]: 259, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 32, TOOLS_QUANTIFIERELIM_TIME[ms]: 249, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 56, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 56, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 6, DOMAIN_JOIN_TIME[ms]: 245, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 3, DOMAIN_WIDEN_TIME[ms]: 134, DOMAIN_ISSUBSETEQ_APPLICATIONS: 4, DOMAIN_ISSUBSETEQ_TIME[ms]: 10, DOMAIN_ISBOTTOM_APPLICATIONS: 12, DOMAIN_ISBOTTOM_TIME[ms]: 17, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 525, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 525, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 4, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 7, DAG_COMPRESSION_PROCESSED_NODES: 77, DAG_COMPRESSION_RETAINED_NODES: 31, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...