./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs2f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/bin/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/brs2f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 73252317e8e8ddde1fed282fcf12f7cfbb9f94a9 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-26 02:29:11,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-26 02:29:11,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-26 02:29:11,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-26 02:29:11,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-26 02:29:11,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-26 02:29:11,764 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-26 02:29:11,772 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-26 02:29:11,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-26 02:29:11,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-26 02:29:11,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-26 02:29:11,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-26 02:29:11,782 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-26 02:29:11,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-26 02:29:11,785 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-26 02:29:11,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-26 02:29:11,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-26 02:29:11,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-26 02:29:11,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-26 02:29:11,793 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-26 02:29:11,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-26 02:29:11,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-26 02:29:11,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-26 02:29:11,802 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-26 02:29:11,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-26 02:29:11,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-26 02:29:11,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-26 02:29:11,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-26 02:29:11,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-26 02:29:11,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-26 02:29:11,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-26 02:29:11,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-26 02:29:11,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-26 02:29:11,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-26 02:29:11,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-26 02:29:11,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-26 02:29:11,811 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-26 02:29:11,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-26 02:29:11,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-26 02:29:11,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-26 02:29:11,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-26 02:29:11,813 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-26 02:29:11,836 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-26 02:29:11,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-26 02:29:11,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-26 02:29:11,838 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-26 02:29:11,838 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-26 02:29:11,838 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-26 02:29:11,838 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-26 02:29:11,838 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-26 02:29:11,839 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-26 02:29:11,839 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-26 02:29:11,839 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-26 02:29:11,839 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-26 02:29:11,840 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-26 02:29:11,840 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-26 02:29:11,840 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-26 02:29:11,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-26 02:29:11,841 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-26 02:29:11,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-26 02:29:11,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-26 02:29:11,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-26 02:29:11,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-26 02:29:11,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-26 02:29:11,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-26 02:29:11,842 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-26 02:29:11,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-26 02:29:11,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-26 02:29:11,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-26 02:29:11,843 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-26 02:29:11,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-26 02:29:11,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-26 02:29:11,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-26 02:29:11,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-26 02:29:11,844 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-26 02:29:11,844 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-26 02:29:11,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-26 02:29:11,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-26 02:29:11,845 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-26 02:29:11,845 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_4050d7cd-2488-466a-968a-d2d639991da3/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 ! call(__VERIFIER_error())) ) 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 -> 73252317e8e8ddde1fed282fcf12f7cfbb9f94a9 [2019-11-26 02:29:11,977 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-26 02:29:11,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-26 02:29:11,992 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-26 02:29:11,994 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-26 02:29:11,994 INFO L275 PluginConnector]: CDTParser initialized [2019-11-26 02:29:11,994 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/bin/utaipan/../../sv-benchmarks/c/array-fpi/brs2f.c [2019-11-26 02:29:12,054 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/bin/utaipan/data/0e0b82daa/491190f7d77144f79c7601478f978139/FLAGfe5952efe [2019-11-26 02:29:12,423 INFO L306 CDTParser]: Found 1 translation units. [2019-11-26 02:29:12,423 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/sv-benchmarks/c/array-fpi/brs2f.c [2019-11-26 02:29:12,430 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/bin/utaipan/data/0e0b82daa/491190f7d77144f79c7601478f978139/FLAGfe5952efe [2019-11-26 02:29:12,839 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/bin/utaipan/data/0e0b82daa/491190f7d77144f79c7601478f978139 [2019-11-26 02:29:12,841 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-26 02:29:12,842 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-26 02:29:12,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-26 02:29:12,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-26 02:29:12,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-26 02:29:12,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:29:12" (1/1) ... [2019-11-26 02:29:12,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49454a8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:12, skipping insertion in model container [2019-11-26 02:29:12,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 02:29:12" (1/1) ... [2019-11-26 02:29:12,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-26 02:29:12,875 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-26 02:29:13,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:29:13,106 INFO L201 MainTranslator]: Completed pre-run [2019-11-26 02:29:13,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-26 02:29:13,144 INFO L205 MainTranslator]: Completed translation [2019-11-26 02:29:13,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:13 WrapperNode [2019-11-26 02:29:13,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-26 02:29:13,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-26 02:29:13,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-26 02:29:13,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-26 02:29:13,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:13" (1/1) ... [2019-11-26 02:29:13,161 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:13" (1/1) ... [2019-11-26 02:29:13,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-26 02:29:13,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-26 02:29:13,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-26 02:29:13,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-26 02:29:13,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:13" (1/1) ... [2019-11-26 02:29:13,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:13" (1/1) ... [2019-11-26 02:29:13,206 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:13" (1/1) ... [2019-11-26 02:29:13,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:13" (1/1) ... [2019-11-26 02:29:13,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:13" (1/1) ... [2019-11-26 02:29:13,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:13" (1/1) ... [2019-11-26 02:29:13,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:13" (1/1) ... [2019-11-26 02:29:13,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-26 02:29:13,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-26 02:29:13,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-26 02:29:13,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-26 02:29:13,238 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/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 [2019-11-26 02:29:13,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-26 02:29:13,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-26 02:29:13,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-26 02:29:13,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-26 02:29:13,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-26 02:29:13,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-26 02:29:13,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-26 02:29:13,718 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-26 02:29:13,719 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-26 02:29:13,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:29:13 BoogieIcfgContainer [2019-11-26 02:29:13,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-26 02:29:13,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-26 02:29:13,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-26 02:29:13,724 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-26 02:29:13,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 02:29:12" (1/3) ... [2019-11-26 02:29:13,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ba1ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:29:13, skipping insertion in model container [2019-11-26 02:29:13,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 02:29:13" (2/3) ... [2019-11-26 02:29:13,726 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ba1ac9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 02:29:13, skipping insertion in model container [2019-11-26 02:29:13,726 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:29:13" (3/3) ... [2019-11-26 02:29:13,728 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2019-11-26 02:29:13,736 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-26 02:29:13,746 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-26 02:29:13,757 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-26 02:29:13,780 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-26 02:29:13,780 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-26 02:29:13,780 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-26 02:29:13,781 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-26 02:29:13,781 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-26 02:29:13,781 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-26 02:29:13,781 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-26 02:29:13,781 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-26 02:29:13,795 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-26 02:29:13,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-26 02:29:13,801 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:29:13,802 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-26 02:29:13,803 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:29:13,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:29:13,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1709729686, now seen corresponding path program 1 times [2019-11-26 02:29:13,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:29:13,817 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747221868] [2019-11-26 02:29:13,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:29:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:29:13,988 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747221868] [2019-11-26 02:29:13,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:29:13,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-26 02:29:13,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045072399] [2019-11-26 02:29:13,992 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-26 02:29:13,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:29:14,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-26 02:29:14,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:29:14,004 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2019-11-26 02:29:14,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:29:14,052 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2019-11-26 02:29:14,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-26 02:29:14,054 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-26 02:29:14,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:29:14,063 INFO L225 Difference]: With dead ends: 18 [2019-11-26 02:29:14,063 INFO L226 Difference]: Without dead ends: 8 [2019-11-26 02:29:14,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-26 02:29:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-26 02:29:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-26 02:29:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-26 02:29:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-26 02:29:14,094 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2019-11-26 02:29:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:29:14,094 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-26 02:29:14,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-26 02:29:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-26 02:29:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-26 02:29:14,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:29:14,095 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:29:14,096 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:29:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:29:14,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1463694476, now seen corresponding path program 1 times [2019-11-26 02:29:14,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:29:14,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454410300] [2019-11-26 02:29:14,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:29:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:29:14,173 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454410300] [2019-11-26 02:29:14,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-26 02:29:14,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-26 02:29:14,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444473626] [2019-11-26 02:29:14,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-26 02:29:14,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:29:14,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-26 02:29:14,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:29:14,176 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2019-11-26 02:29:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:29:14,198 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-11-26 02:29:14,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-26 02:29:14,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-26 02:29:14,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:29:14,199 INFO L225 Difference]: With dead ends: 12 [2019-11-26 02:29:14,199 INFO L226 Difference]: Without dead ends: 9 [2019-11-26 02:29:14,200 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-26 02:29:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-26 02:29:14,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-26 02:29:14,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-26 02:29:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-26 02:29:14,202 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2019-11-26 02:29:14,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:29:14,203 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-26 02:29:14,203 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-26 02:29:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-26 02:29:14,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-26 02:29:14,203 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:29:14,203 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:29:14,204 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:29:14,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:29:14,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1870068243, now seen corresponding path program 1 times [2019-11-26 02:29:14,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:29:14,205 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309406787] [2019-11-26 02:29:14,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:29:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:29:14,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309406787] [2019-11-26 02:29:14,298 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041791468] [2019-11-26 02:29:14,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/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 [2019-11-26 02:29:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:14,364 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-26 02:29:14,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:29:14,449 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-26 02:29:14,449 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:29:14,458 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:29:14,459 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-26 02:29:14,459 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2019-11-26 02:29:14,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:29:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:29:14,512 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:29:14,545 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-26 02:29:14,586 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-26 02:29:14,586 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 28 [2019-11-26 02:29:14,587 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-26 02:29:14,588 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-26 02:29:14,609 INFO L567 ElimStorePlain]: treesize reduction 5, result has 68.8 percent of original size [2019-11-26 02:29:14,609 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2019-11-26 02:29:14,610 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:11 [2019-11-26 02:29:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-26 02:29:14,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [513241201] [2019-11-26 02:29:14,662 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-26 02:29:14,662 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:29:14,669 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:29:14,674 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:29:14,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:29:14,997 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:15,008 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:15,040 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:15,066 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:15,095 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:15,105 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:15,114 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:15,249 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:15,290 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:15,373 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:15,505 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:29:15,649 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-11-26 02:29:15,918 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:29:15,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:29:15,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2019-11-26 02:29:15,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097310163] [2019-11-26 02:29:15,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-26 02:29:15,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:29:15,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-26 02:29:15,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:29:15,920 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 13 states. [2019-11-26 02:29:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:29:15,988 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-11-26 02:29:15,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-26 02:29:15,989 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 8 [2019-11-26 02:29:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:29:15,989 INFO L225 Difference]: With dead ends: 13 [2019-11-26 02:29:15,990 INFO L226 Difference]: Without dead ends: 10 [2019-11-26 02:29:15,991 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-11-26 02:29:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-26 02:29:15,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-26 02:29:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-26 02:29:15,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-26 02:29:15,993 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2019-11-26 02:29:15,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:29:15,993 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-26 02:29:15,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-26 02:29:15,994 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2019-11-26 02:29:15,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-26 02:29:15,994 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:29:15,994 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-26 02:29:16,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:29:16,195 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:29:16,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:29:16,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2137497428, now seen corresponding path program 2 times [2019-11-26 02:29:16,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:29:16,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655845000] [2019-11-26 02:29:16,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:29:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:29:16,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655845000] [2019-11-26 02:29:16,286 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929527477] [2019-11-26 02:29:16,287 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/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 [2019-11-26 02:29:16,340 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-26 02:29:16,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:29:16,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-26 02:29:16,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:29:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:29:16,380 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:29:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:29:16,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57758141] [2019-11-26 02:29:16,409 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-26 02:29:16,409 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:29:16,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:29:16,409 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:29:16,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:29:16,474 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,495 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,501 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,564 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,572 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,585 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,597 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,627 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,656 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,677 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,779 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,802 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,845 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,905 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:16,997 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:29:17,301 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:29:17,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:29:17,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2019-11-26 02:29:17,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925824754] [2019-11-26 02:29:17,302 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-26 02:29:17,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:29:17,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-26 02:29:17,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-11-26 02:29:17,303 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 10 states. [2019-11-26 02:29:17,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:29:17,362 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2019-11-26 02:29:17,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-26 02:29:17,362 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2019-11-26 02:29:17,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:29:17,363 INFO L225 Difference]: With dead ends: 17 [2019-11-26 02:29:17,363 INFO L226 Difference]: Without dead ends: 11 [2019-11-26 02:29:17,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-11-26 02:29:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-26 02:29:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-26 02:29:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-26 02:29:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-26 02:29:17,366 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2019-11-26 02:29:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:29:17,366 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-26 02:29:17,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-26 02:29:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2019-11-26 02:29:17,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-26 02:29:17,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:29:17,367 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-26 02:29:17,568 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:29:17,568 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:29:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:29:17,569 INFO L82 PathProgramCache]: Analyzing trace with hash 263264266, now seen corresponding path program 3 times [2019-11-26 02:29:17,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:29:17,569 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977164982] [2019-11-26 02:29:17,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:29:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:29:17,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977164982] [2019-11-26 02:29:17,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814378013] [2019-11-26 02:29:17,877 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/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 [2019-11-26 02:29:17,914 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-26 02:29:17,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-26 02:29:17,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-26 02:29:17,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:29:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:29:18,187 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:29:18,418 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-26 02:29:18,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:29:18,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1632424244] [2019-11-26 02:29:18,648 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-26 02:29:18,648 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:29:18,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:29:18,649 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:29:18,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:29:18,801 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:18,810 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:18,820 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:18,829 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:18,838 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:18,849 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:18,857 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:18,935 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:18,966 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:19,009 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:19,048 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:19,137 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:29:19,276 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2019-11-26 02:29:19,570 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:29:19,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:29:19,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2019-11-26 02:29:19,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275822764] [2019-11-26 02:29:19,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-26 02:29:19,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:29:19,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-26 02:29:19,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2019-11-26 02:29:19,572 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 22 states. [2019-11-26 02:29:20,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:29:20,131 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2019-11-26 02:29:20,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-26 02:29:20,132 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 10 [2019-11-26 02:29:20,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:29:20,133 INFO L225 Difference]: With dead ends: 15 [2019-11-26 02:29:20,133 INFO L226 Difference]: Without dead ends: 12 [2019-11-26 02:29:20,133 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2019-11-26 02:29:20,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-26 02:29:20,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-26 02:29:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-26 02:29:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-26 02:29:20,136 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2019-11-26 02:29:20,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:29:20,137 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-26 02:29:20,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-26 02:29:20,137 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2019-11-26 02:29:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-26 02:29:20,137 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:29:20,138 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2019-11-26 02:29:20,338 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:29:20,338 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:29:20,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:29:20,338 INFO L82 PathProgramCache]: Analyzing trace with hash -428785603, now seen corresponding path program 4 times [2019-11-26 02:29:20,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:29:20,339 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403822645] [2019-11-26 02:29:20,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:29:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:29:20,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403822645] [2019-11-26 02:29:20,411 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069885127] [2019-11-26 02:29:20,411 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/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 [2019-11-26 02:29:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-26 02:29:20,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-26 02:29:20,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-26 02:29:20,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:29:20,493 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-26 02:29:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-26 02:29:20,521 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234202008] [2019-11-26 02:29:20,522 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-26 02:29:20,522 INFO L166 IcfgInterpreter]: Building call graph [2019-11-26 02:29:20,522 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-26 02:29:20,523 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-26 02:29:20,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-26 02:29:20,571 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:20,594 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:20,600 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:20,678 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:20,686 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:20,694 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:20,704 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:20,712 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:20,739 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:20,759 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:20,852 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:20,919 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:20,963 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-26 02:29:21,048 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-26 02:29:21,410 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2019-11-26 02:29:21,411 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-26 02:29:21,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-26 02:29:21,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2019-11-26 02:29:21,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357963915] [2019-11-26 02:29:21,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-26 02:29:21,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-26 02:29:21,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-26 02:29:21,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-11-26 02:29:21,412 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 13 states. [2019-11-26 02:29:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-26 02:29:21,468 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-11-26 02:29:21,468 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-26 02:29:21,468 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2019-11-26 02:29:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-26 02:29:21,469 INFO L225 Difference]: With dead ends: 20 [2019-11-26 02:29:21,469 INFO L226 Difference]: Without dead ends: 13 [2019-11-26 02:29:21,469 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2019-11-26 02:29:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-26 02:29:21,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-26 02:29:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-26 02:29:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-26 02:29:21,472 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2019-11-26 02:29:21,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-26 02:29:21,472 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-26 02:29:21,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-26 02:29:21,472 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-11-26 02:29:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-26 02:29:21,473 INFO L402 BasicCegarLoop]: Found error trace [2019-11-26 02:29:21,473 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2019-11-26 02:29:21,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-26 02:29:21,676 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-26 02:29:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-26 02:29:21,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1975557261, now seen corresponding path program 5 times [2019-11-26 02:29:21,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-26 02:29:21,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508021944] [2019-11-26 02:29:21,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-26 02:29:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:29:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-26 02:29:21,823 INFO L174 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2019-11-26 02:29:21,823 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-26 02:29:21,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.11 02:29:21 BoogieIcfgContainer [2019-11-26 02:29:21,870 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-26 02:29:21,871 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-26 02:29:21,871 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-26 02:29:21,871 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-26 02:29:21,871 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 02:29:13" (3/4) ... [2019-11-26 02:29:21,873 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-26 02:29:21,925 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_4050d7cd-2488-466a-968a-d2d639991da3/bin/utaipan/witness.graphml [2019-11-26 02:29:21,926 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-26 02:29:21,927 INFO L168 Benchmark]: Toolchain (without parser) took 9084.70 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 232.8 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -238.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:29:21,927 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:29:21,927 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.8 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -217.8 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:21,928 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.05 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-26 02:29:21,928 INFO L168 Benchmark]: Boogie Preprocessor took 52.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:21,928 INFO L168 Benchmark]: RCFGBuilder took 483.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:21,929 INFO L168 Benchmark]: TraceAbstraction took 8149.48 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 65.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -58.6 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:21,929 INFO L168 Benchmark]: Witness Printer took 55.30 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 11.5 GB. [2019-11-26 02:29:21,931 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 302.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 167.8 MB). Free memory was 944.7 MB in the beginning and 1.2 GB in the end (delta: -217.8 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 38.05 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 52.25 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 483.68 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 8149.48 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 65.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -58.6 MB). Peak memory consumption was 6.4 MB. Max. memory is 11.5 GB. * Witness Printer took 55.30 ms. Allocated memory is still 1.3 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int N; [L18] N = __VERIFIER_nondet_int() [L19] COND FALSE !(N <= 0) [L22] int i; [L23] long long sum[1]; [L24] int *a = malloc(sizeof(int)*N); [L26] i=0 VAL [N=3] [L26] COND TRUE i