./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-lit/cggmp2005_true-unreach-call_true-termination.c.i --full-output --rcfgbuilder.size.of.a.code.block LoopFreeBlock --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0210da8c Calling Ultimate with: java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/TaipanReach.xml -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005_true-unreach-call_true-termination.c.i -s /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UTaipan-linux --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 6ee0c0bb9185005ad94b7785b09df595a41ce360 --rcfgbuilder.size.of.a.code.block LoopFreeBlock ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-22 10:18:13,080 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-22 10:18:13,085 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-22 10:18:13,099 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-22 10:18:13,100 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-22 10:18:13,101 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-22 10:18:13,102 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-22 10:18:13,104 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-22 10:18:13,106 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-22 10:18:13,107 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-22 10:18:13,107 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-22 10:18:13,108 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-22 10:18:13,109 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-22 10:18:13,110 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-22 10:18:13,111 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-22 10:18:13,112 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-22 10:18:13,113 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-22 10:18:13,115 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-22 10:18:13,117 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-22 10:18:13,119 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-22 10:18:13,120 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-22 10:18:13,121 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-22 10:18:13,124 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-22 10:18:13,124 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-22 10:18:13,124 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-22 10:18:13,125 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-22 10:18:13,126 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-22 10:18:13,127 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-22 10:18:13,128 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-22 10:18:13,129 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-22 10:18:13,129 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-22 10:18:13,130 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-22 10:18:13,130 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-22 10:18:13,130 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-22 10:18:13,132 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-22 10:18:13,132 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-22 10:18:13,133 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-22 10:18:13,148 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-22 10:18:13,148 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-22 10:18:13,149 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-22 10:18:13,149 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-22 10:18:13,149 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-22 10:18:13,149 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-22 10:18:13,150 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-22 10:18:13,150 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-22 10:18:13,151 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-22 10:18:13,151 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-22 10:18:13,151 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-22 10:18:13,152 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-22 10:18:13,152 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-22 10:18:13,152 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-22 10:18:13,152 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-22 10:18:13,152 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-22 10:18:13,152 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-22 10:18:13,153 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-22 10:18:13,154 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-22 10:18:13,154 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-22 10:18:13,154 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-22 10:18:13,154 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-22 10:18:13,155 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-22 10:18:13,155 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-22 10:18:13,155 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-22 10:18:13,156 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-22 10:18:13,156 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-22 10:18:13,156 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-22 10:18:13,156 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-22 10:18:13,156 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-22 10:18:13,157 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-22 10:18:13,157 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-22 10:18:13,157 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-22 10:18:13,157 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-22 10:18:13,157 INFO L133 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 -> /storage/repos/ultimate/releaseScripts/default/UTaipan-linux 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 -> 6ee0c0bb9185005ad94b7785b09df595a41ce360 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock [2018-10-22 10:18:13,231 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-22 10:18:13,249 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-22 10:18:13,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-22 10:18:13,254 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-22 10:18:13,257 INFO L276 PluginConnector]: CDTParser initialized [2018-10-22 10:18:13,258 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005_true-unreach-call_true-termination.c.i [2018-10-22 10:18:13,318 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3bad96580/b6bfc17512af433fa20ef6da1e95d8e6/FLAG83fe33a97 [2018-10-22 10:18:13,779 INFO L298 CDTParser]: Found 1 translation units. [2018-10-22 10:18:13,779 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005_true-unreach-call_true-termination.c.i [2018-10-22 10:18:13,789 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3bad96580/b6bfc17512af433fa20ef6da1e95d8e6/FLAG83fe33a97 [2018-10-22 10:18:13,809 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3bad96580/b6bfc17512af433fa20ef6da1e95d8e6 [2018-10-22 10:18:13,813 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-22 10:18:13,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-22 10:18:13,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-22 10:18:13,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-22 10:18:13,820 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-22 10:18:13,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:18:13" (1/1) ... [2018-10-22 10:18:13,824 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21b67062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:13, skipping insertion in model container [2018-10-22 10:18:13,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 10:18:13" (1/1) ... [2018-10-22 10:18:13,838 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-22 10:18:13,857 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-22 10:18:14,026 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:18:14,031 INFO L189 MainTranslator]: Completed pre-run [2018-10-22 10:18:14,048 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-22 10:18:14,065 INFO L193 MainTranslator]: Completed translation [2018-10-22 10:18:14,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:14 WrapperNode [2018-10-22 10:18:14,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-22 10:18:14,067 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-22 10:18:14,067 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-22 10:18:14,067 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-22 10:18:14,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:14" (1/1) ... [2018-10-22 10:18:14,083 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:14" (1/1) ... [2018-10-22 10:18:14,090 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-22 10:18:14,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-22 10:18:14,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-22 10:18:14,091 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-22 10:18:14,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:14" (1/1) ... [2018-10-22 10:18:14,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:14" (1/1) ... [2018-10-22 10:18:14,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:14" (1/1) ... [2018-10-22 10:18:14,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:14" (1/1) ... [2018-10-22 10:18:14,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:14" (1/1) ... [2018-10-22 10:18:14,112 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:14" (1/1) ... [2018-10-22 10:18:14,113 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:14" (1/1) ... [2018-10-22 10:18:14,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-22 10:18:14,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-22 10:18:14,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-22 10:18:14,117 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-22 10:18:14,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/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 [2018-10-22 10:18:14,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-22 10:18:14,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-22 10:18:14,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-22 10:18:14,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-22 10:18:14,197 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-22 10:18:14,197 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-22 10:18:14,197 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-22 10:18:14,198 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-22 10:18:14,590 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-22 10:18:14,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:18:14 BoogieIcfgContainer [2018-10-22 10:18:14,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-22 10:18:14,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-22 10:18:14,593 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-22 10:18:14,596 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-22 10:18:14,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 10:18:13" (1/3) ... [2018-10-22 10:18:14,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d05c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:18:14, skipping insertion in model container [2018-10-22 10:18:14,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 10:18:14" (2/3) ... [2018-10-22 10:18:14,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30d05c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 10:18:14, skipping insertion in model container [2018-10-22 10:18:14,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:18:14" (3/3) ... [2018-10-22 10:18:14,601 INFO L112 eAbstractionObserver]: Analyzing ICFG cggmp2005_true-unreach-call_true-termination.c.i [2018-10-22 10:18:14,611 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-22 10:18:14,619 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-22 10:18:14,638 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-22 10:18:14,679 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-22 10:18:14,679 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-22 10:18:14,680 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-22 10:18:14,680 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-22 10:18:14,680 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-22 10:18:14,680 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-22 10:18:14,680 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-22 10:18:14,680 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-22 10:18:14,680 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-22 10:18:14,702 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2018-10-22 10:18:14,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-22 10:18:14,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:14,711 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:14,713 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:14,718 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:14,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1871509567, now seen corresponding path program 1 times [2018-10-22 10:18:14,721 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:14,763 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:14,764 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:14,764 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:14,764 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:14,827 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:18:14,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-22 10:18:14,827 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:18:14,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-22 10:18:14,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-22 10:18:14,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 10:18:14,845 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2018-10-22 10:18:14,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:14,866 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2018-10-22 10:18:14,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-22 10:18:14,868 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-10-22 10:18:14,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:14,877 INFO L225 Difference]: With dead ends: 29 [2018-10-22 10:18:14,879 INFO L226 Difference]: Without dead ends: 12 [2018-10-22 10:18:14,883 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-22 10:18:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-22 10:18:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-22 10:18:14,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-22 10:18:14,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-22 10:18:14,922 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-22 10:18:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:14,923 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-22 10:18:14,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-22 10:18:14,923 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-22 10:18:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-22 10:18:14,924 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:14,924 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:14,924 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:14,924 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:14,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1861991801, now seen corresponding path program 1 times [2018-10-22 10:18:14,925 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:14,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:14,926 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:14,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:14,926 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:15,016 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:18:15,016 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-22 10:18:15,017 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:18:15,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-22 10:18:15,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-22 10:18:15,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-22 10:18:15,020 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2018-10-22 10:18:15,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:15,072 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-22 10:18:15,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-22 10:18:15,072 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2018-10-22 10:18:15,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:15,073 INFO L225 Difference]: With dead ends: 19 [2018-10-22 10:18:15,073 INFO L226 Difference]: Without dead ends: 14 [2018-10-22 10:18:15,074 INFO L605 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 [2018-10-22 10:18:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-22 10:18:15,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-22 10:18:15,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-22 10:18:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-22 10:18:15,079 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2018-10-22 10:18:15,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:15,079 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-22 10:18:15,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-22 10:18:15,079 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-22 10:18:15,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-22 10:18:15,080 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:15,080 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:15,080 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:15,081 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:15,081 INFO L82 PathProgramCache]: Analyzing trace with hash -661808769, now seen corresponding path program 1 times [2018-10-22 10:18:15,081 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:15,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:15,082 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:15,082 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:15,082 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:15,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:15,188 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:18:15,189 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 14 with the following transitions: [2018-10-22 10:18:15,191 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [12], [14], [21], [24], [26], [32], [33], [34], [36] [2018-10-22 10:18:15,233 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-22 10:18:15,234 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-22 10:18:15,457 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-22 10:18:15,459 INFO L272 AbstractInterpreter]: Visited 12 different actions 38 times. Merged at 3 different actions 14 times. Widened at 1 different actions 2 times. Found 1 fixpoints after 1 different actions. Largest state had 2 variables. [2018-10-22 10:18:15,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:15,474 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-22 10:18:15,474 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:15,474 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:18:15,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:15,486 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:18:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:15,516 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:15,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:15,604 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:15,735 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:15,735 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:18:15,752 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:15,752 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-22 10:18:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:15,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:15,774 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:15,799 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:18:15,800 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4] total 8 [2018-10-22 10:18:15,800 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:18:15,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-22 10:18:15,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-22 10:18:15,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2018-10-22 10:18:15,801 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2018-10-22 10:18:15,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:15,859 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-22 10:18:15,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-22 10:18:15,860 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2018-10-22 10:18:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:15,861 INFO L225 Difference]: With dead ends: 21 [2018-10-22 10:18:15,861 INFO L226 Difference]: Without dead ends: 16 [2018-10-22 10:18:15,862 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2018-10-22 10:18:15,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-22 10:18:15,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-22 10:18:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-22 10:18:15,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-22 10:18:15,867 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-10-22 10:18:15,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:15,868 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-22 10:18:15,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-22 10:18:15,868 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-22 10:18:15,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-22 10:18:15,869 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:15,869 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:15,869 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:15,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:15,870 INFO L82 PathProgramCache]: Analyzing trace with hash 622365701, now seen corresponding path program 2 times [2018-10-22 10:18:15,870 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:15,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:15,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-22 10:18:15,871 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:15,871 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:16,004 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:16,004 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:18:16,005 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:18:16,005 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:18:16,005 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:16,005 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:18:16,021 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:18:16,021 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:18:16,033 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:18:16,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:18:16,035 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:16,294 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:16,379 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:16,379 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:18:16,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-22 10:18:16,395 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-22 10:18:16,411 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-22 10:18:16,412 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:18:16,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:16,425 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:16,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:18:16,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5] total 9 [2018-10-22 10:18:16,466 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:18:16,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-22 10:18:16,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-22 10:18:16,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-22 10:18:16,467 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2018-10-22 10:18:16,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:16,493 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-22 10:18:16,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-22 10:18:16,494 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2018-10-22 10:18:16,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:16,495 INFO L225 Difference]: With dead ends: 23 [2018-10-22 10:18:16,495 INFO L226 Difference]: Without dead ends: 18 [2018-10-22 10:18:16,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2018-10-22 10:18:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-22 10:18:16,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-22 10:18:16,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-22 10:18:16,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-22 10:18:16,500 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2018-10-22 10:18:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:16,500 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-22 10:18:16,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-22 10:18:16,501 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-22 10:18:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-22 10:18:16,501 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:16,502 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:16,502 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:16,502 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:16,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2058417419, now seen corresponding path program 3 times [2018-10-22 10:18:16,502 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:16,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:16,504 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:18:16,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:16,504 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:16,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:16,612 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:16,612 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:18:16,613 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:18:16,613 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:18:16,613 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:16,613 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:18:16,625 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:18:16,625 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:18:16,696 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 10:18:16,696 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:18:16,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:16,783 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:16,783 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:16,861 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:16,861 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:18:16,877 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-22 10:18:16,877 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-22 10:18:16,904 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-22 10:18:16,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:18:16,908 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:16,915 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:17,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:17,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:18:17,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6] total 10 [2018-10-22 10:18:17,009 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:18:17,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-22 10:18:17,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-22 10:18:17,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:18:17,011 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2018-10-22 10:18:17,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:17,043 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-22 10:18:17,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-22 10:18:17,043 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2018-10-22 10:18:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:17,044 INFO L225 Difference]: With dead ends: 25 [2018-10-22 10:18:17,044 INFO L226 Difference]: Without dead ends: 20 [2018-10-22 10:18:17,045 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2018-10-22 10:18:17,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-22 10:18:17,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-22 10:18:17,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-22 10:18:17,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-22 10:18:17,051 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 17 [2018-10-22 10:18:17,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:17,051 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-22 10:18:17,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-22 10:18:17,051 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-22 10:18:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-22 10:18:17,052 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:17,052 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:17,052 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:17,053 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:17,053 INFO L82 PathProgramCache]: Analyzing trace with hash -875350895, now seen corresponding path program 4 times [2018-10-22 10:18:17,053 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:17,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:17,054 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:18:17,054 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:17,054 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:17,541 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-10-22 10:18:17,563 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:17,564 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:17,564 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-22 10:18:17,564 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-22 10:18:17,565 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-22 10:18:17,565 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:17,565 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-22 10:18:17,573 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 10:18:17,573 INFO L295 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 10:18:17,600 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 10:18:17,600 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:18:17,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:17,668 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:17,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:17,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-22 10:18:17,744 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode CVC4_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 [2018-10-22 10:18:17,759 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-22 10:18:17,759 INFO L295 anRefinementStrategy]: Using traceCheck mode CVC4_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-22 10:18:17,775 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-22 10:18:17,775 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-22 10:18:17,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-22 10:18:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:17,813 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-22 10:18:17,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [MP cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk --tlimit-per=12000 (9)] Exception during sending of exit command (exit): Broken pipe [2018-10-22 10:18:17,856 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 5 imperfect interpolant sequences. [2018-10-22 10:18:17,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9] total 11 [2018-10-22 10:18:17,857 INFO L258 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-22 10:18:17,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-22 10:18:17,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-22 10:18:17,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-10-22 10:18:17,859 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 9 states. [2018-10-22 10:18:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:17,989 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-22 10:18:17,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-22 10:18:17,990 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-10-22 10:18:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:17,991 INFO L225 Difference]: With dead ends: 27 [2018-10-22 10:18:17,991 INFO L226 Difference]: Without dead ends: 22 [2018-10-22 10:18:17,992 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-10-22 10:18:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-22 10:18:17,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-22 10:18:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-22 10:18:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-22 10:18:17,996 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 19 [2018-10-22 10:18:17,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:17,996 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-22 10:18:17,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-22 10:18:17,997 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-22 10:18:17,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-22 10:18:17,998 INFO L367 BasicCegarLoop]: Found error trace [2018-10-22 10:18:17,998 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-22 10:18:17,998 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-22 10:18:17,998 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-22 10:18:17,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1566812823, now seen corresponding path program 5 times [2018-10-22 10:18:17,999 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-22 10:18:17,999 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:18,000 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-22 10:18:18,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-22 10:18:18,000 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-22 10:18:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-22 10:18:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-22 10:18:18,120 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-22 10:18:18,120 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-10-22 10:18:18,121 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-22 10:18:18,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-22 10:18:18,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-22 10:18:18,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 10:18:18,122 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2018-10-22 10:18:18,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-22 10:18:18,139 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-22 10:18:18,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-22 10:18:18,141 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2018-10-22 10:18:18,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-22 10:18:18,141 INFO L225 Difference]: With dead ends: 22 [2018-10-22 10:18:18,142 INFO L226 Difference]: Without dead ends: 0 [2018-10-22 10:18:18,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2018-10-22 10:18:18,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-22 10:18:18,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-22 10:18:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-22 10:18:18,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-22 10:18:18,143 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-10-22 10:18:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-22 10:18:18,143 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-22 10:18:18,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-22 10:18:18,144 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-22 10:18:18,144 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-22 10:18:18,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-22 10:18:18,365 WARN L179 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2018-10-22 10:18:18,385 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-22 10:18:18,385 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:18:18,385 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-22 10:18:18,385 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-22 10:18:18,385 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-22 10:18:18,386 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-22 10:18:18,386 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 20) the Hoare annotation is: true [2018-10-22 10:18:18,386 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 20) no Hoare annotation was computed. [2018-10-22 10:18:18,386 INFO L425 ceAbstractionStarter]: For program point L18(line 18) no Hoare annotation was computed. [2018-10-22 10:18:18,386 INFO L425 ceAbstractionStarter]: For program point L14-1(lines 14 17) no Hoare annotation was computed. [2018-10-22 10:18:18,386 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 20) no Hoare annotation was computed. [2018-10-22 10:18:18,386 INFO L421 ceAbstractionStarter]: At program point L14-3(lines 14 17) the Hoare annotation is: (or (and (<= 8 main_~j~0) (<= main_~j~0 (+ main_~i~0 3)) (<= main_~i~0 5)) (and (<= 6 main_~j~0) (<= (+ main_~j~0 3) main_~i~0) (<= main_~j~0 6)) (and (<= main_~j~0 (+ main_~i~0 9)) (<= main_~i~0 1) (<= 10 main_~j~0)) (and (<= 7 main_~j~0) (<= main_~j~0 main_~i~0) (<= main_~i~0 7)) (and (<= main_~i~0 3) (<= main_~j~0 (+ main_~i~0 6)) (<= 9 main_~j~0))) [2018-10-22 10:18:18,386 INFO L421 ceAbstractionStarter]: At program point L14-4(lines 14 17) the Hoare annotation is: (and (<= 6 main_~j~0) (<= main_~j~0 6)) [2018-10-22 10:18:18,386 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-22 10:18:18,387 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-22 10:18:18,387 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-22 10:18:18,387 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-22 10:18:18,387 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-22 10:18:18,387 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-22 10:18:18,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 10:18:18 BoogieIcfgContainer [2018-10-22 10:18:18,401 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-22 10:18:18,402 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-22 10:18:18,402 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-22 10:18:18,402 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-22 10:18:18,403 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 10:18:14" (3/4) ... [2018-10-22 10:18:18,406 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-22 10:18:18,410 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-22 10:18:18,411 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-22 10:18:18,411 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-22 10:18:18,415 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2018-10-22 10:18:18,415 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-10-22 10:18:18,415 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2018-10-22 10:18:18,458 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-22 10:18:18,458 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-22 10:18:18,459 INFO L168 Benchmark]: Toolchain (without parser) took 4645.66 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 951.8 MB in the beginning and 928.6 MB in the end (delta: 23.2 MB). Peak memory consumption was 175.2 MB. Max. memory is 11.5 GB. [2018-10-22 10:18:18,460 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:18:18,461 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.87 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-22 10:18:18,462 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.63 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:18:18,462 INFO L168 Benchmark]: Boogie Preprocessor took 24.08 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:18:18,463 INFO L168 Benchmark]: RCFGBuilder took 475.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -194.5 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. [2018-10-22 10:18:18,464 INFO L168 Benchmark]: TraceAbstraction took 3808.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 928.6 MB in the end (delta: 207.0 MB). Peak memory consumption was 207.0 MB. Max. memory is 11.5 GB. [2018-10-22 10:18:18,465 INFO L168 Benchmark]: Witness Printer took 56.52 ms. Allocated memory is still 1.2 GB. Free memory is still 928.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-22 10:18:18,469 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 250.87 ms. Allocated memory is still 1.0 GB. Free memory was 951.8 MB in the beginning and 941.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 23.63 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 24.08 ms. Allocated memory is still 1.0 GB. Free memory is still 941.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 475.83 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.0 MB). Free memory was 941.1 MB in the beginning and 1.1 GB in the end (delta: -194.5 MB). Peak memory consumption was 26.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 3808.99 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 928.6 MB in the end (delta: 207.0 MB). Peak memory consumption was 207.0 MB. Max. memory is 11.5 GB. * Witness Printer took 56.52 ms. Allocated memory is still 1.2 GB. Free memory is still 928.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (((((8 <= j && j <= i + 3) && i <= 5) || ((6 <= j && j + 3 <= i) && j <= 6)) || ((j <= i + 9 && i <= 1) && 10 <= j)) || ((7 <= j && j <= i) && i <= 7)) || ((i <= 3 && j <= i + 6) && 9 <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. SAFE Result, 3.7s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.2s HoareAnnotationTime, HoareTripleCheckerStatistics: 85 SDtfs, 1 SDslu, 188 SDs, 0 SdLazy, 94 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 232 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 19 NumberOfFragments, 71 HoareAnnotationTreeSize, 13 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 17 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 234 NumberOfCodeBlocks, 234 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 339 ConstructedInterpolants, 0 QuantifiedInterpolants, 18193 SizeOfPredicates, 16 NumberOfNonLiveVariables, 320 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 30/230 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...