./Ultimate.py --spec ../../../trunk/examples/svcomp/ReachSafety.prp --file ../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i --full-output --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-invgen/string_concat-noarr_true-unreach-call_true-termination.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 9f3cf63c7adaf3e2c576343bf7deb0d4236e103c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0210da8 [2018-10-21 12:37:40,807 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-21 12:37:40,809 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-21 12:37:40,821 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-21 12:37:40,822 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-21 12:37:40,823 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-21 12:37:40,824 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-21 12:37:40,826 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-21 12:37:40,828 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-21 12:37:40,829 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-21 12:37:40,830 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-21 12:37:40,830 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-21 12:37:40,831 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-21 12:37:40,832 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-21 12:37:40,833 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-21 12:37:40,834 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-21 12:37:40,835 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-21 12:37:40,837 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-21 12:37:40,839 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-21 12:37:40,841 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-21 12:37:40,842 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-21 12:37:40,844 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-21 12:37:40,846 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-21 12:37:40,847 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-21 12:37:40,847 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-21 12:37:40,848 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-21 12:37:40,849 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-21 12:37:40,850 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-21 12:37:40,851 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-21 12:37:40,852 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-21 12:37:40,852 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-21 12:37:40,853 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-21 12:37:40,853 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-21 12:37:40,853 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-21 12:37:40,854 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-21 12:37:40,855 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-21 12:37:40,855 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-10-21 12:37:40,887 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-21 12:37:40,887 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-21 12:37:40,888 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-21 12:37:40,888 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-21 12:37:40,890 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-21 12:37:40,890 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-21 12:37:40,890 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-21 12:37:40,891 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-21 12:37:40,891 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-21 12:37:40,891 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-21 12:37:40,891 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-21 12:37:40,893 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-21 12:37:40,894 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-21 12:37:40,894 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-21 12:37:40,894 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-21 12:37:40,894 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-21 12:37:40,894 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-21 12:37:40,895 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-21 12:37:40,896 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-21 12:37:40,896 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-21 12:37:40,897 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-21 12:37:40,898 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-21 12:37:40,898 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-21 12:37:40,898 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-21 12:37:40,898 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-21 12:37:40,899 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-21 12:37:40,899 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-21 12:37:40,899 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-21 12:37:40,899 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-21 12:37:40,899 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-21 12:37:40,899 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-21 12:37:40,900 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-21 12:37:40,900 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-21 12:37:40,900 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-21 12:37:40,900 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 -> 9f3cf63c7adaf3e2c576343bf7deb0d4236e103c [2018-10-21 12:37:40,962 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-21 12:37:40,989 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-21 12:37:40,993 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-21 12:37:40,995 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-21 12:37:40,995 INFO L276 PluginConnector]: CDTParser initialized [2018-10-21 12:37:40,995 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i [2018-10-21 12:37:41,049 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3584577f7/3b7c206b81c14f66ba0ee60d4c710b35/FLAGcda1436ba [2018-10-21 12:37:41,497 INFO L298 CDTParser]: Found 1 translation units. [2018-10-21 12:37:41,498 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/string_concat-noarr_true-unreach-call_true-termination.i [2018-10-21 12:37:41,511 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3584577f7/3b7c206b81c14f66ba0ee60d4c710b35/FLAGcda1436ba [2018-10-21 12:37:41,527 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/3584577f7/3b7c206b81c14f66ba0ee60d4c710b35 [2018-10-21 12:37:41,532 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-21 12:37:41,533 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-10-21 12:37:41,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-21 12:37:41,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-21 12:37:41,538 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-21 12:37:41,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:37:41" (1/1) ... [2018-10-21 12:37:41,543 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697dd2ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:41, skipping insertion in model container [2018-10-21 12:37:41,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 12:37:41" (1/1) ... [2018-10-21 12:37:41,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-21 12:37:41,578 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-21 12:37:41,782 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:37:41,785 INFO L189 MainTranslator]: Completed pre-run [2018-10-21 12:37:41,803 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-21 12:37:41,818 INFO L193 MainTranslator]: Completed translation [2018-10-21 12:37:41,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:41 WrapperNode [2018-10-21 12:37:41,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-21 12:37:41,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-21 12:37:41,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-21 12:37:41,820 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-21 12:37:41,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:41" (1/1) ... [2018-10-21 12:37:41,835 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:41" (1/1) ... [2018-10-21 12:37:41,840 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-21 12:37:41,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-21 12:37:41,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-21 12:37:41,841 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-21 12:37:41,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:41" (1/1) ... [2018-10-21 12:37:41,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:41" (1/1) ... [2018-10-21 12:37:41,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:41" (1/1) ... [2018-10-21 12:37:41,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:41" (1/1) ... [2018-10-21 12:37:41,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:41" (1/1) ... [2018-10-21 12:37:41,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:41" (1/1) ... [2018-10-21 12:37:41,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:41" (1/1) ... [2018-10-21 12:37:41,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-21 12:37:41,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-21 12:37:41,863 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-21 12:37:41,864 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-21 12:37:41,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:41" (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 [2018-10-21 12:37:41,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-21 12:37:41,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-21 12:37:41,991 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-21 12:37:41,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-21 12:37:41,992 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-21 12:37:41,992 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-21 12:37:41,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-21 12:37:41,992 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-21 12:37:42,240 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-21 12:37:42,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:37:42 BoogieIcfgContainer [2018-10-21 12:37:42,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-21 12:37:42,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-21 12:37:42,242 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-21 12:37:42,245 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-21 12:37:42,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 12:37:41" (1/3) ... [2018-10-21 12:37:42,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@713f72cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:37:42, skipping insertion in model container [2018-10-21 12:37:42,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 12:37:41" (2/3) ... [2018-10-21 12:37:42,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@713f72cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 12:37:42, skipping insertion in model container [2018-10-21 12:37:42,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:37:42" (3/3) ... [2018-10-21 12:37:42,250 INFO L112 eAbstractionObserver]: Analyzing ICFG string_concat-noarr_true-unreach-call_true-termination.i [2018-10-21 12:37:42,260 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-21 12:37:42,267 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-21 12:37:42,284 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-21 12:37:42,321 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-21 12:37:42,322 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-21 12:37:42,322 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-21 12:37:42,322 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-21 12:37:42,322 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-21 12:37:42,323 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-21 12:37:42,323 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-21 12:37:42,323 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-21 12:37:42,323 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-21 12:37:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2018-10-21 12:37:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-21 12:37:42,348 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:37:42,349 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:37:42,351 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:37:42,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:37:42,358 INFO L82 PathProgramCache]: Analyzing trace with hash -745796184, now seen corresponding path program 1 times [2018-10-21 12:37:42,360 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:37:42,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:42,405 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:37:42,405 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:42,406 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:37:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:37:42,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:42,467 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:37:42,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-21 12:37:42,467 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:37:42,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-21 12:37:42,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-21 12:37:42,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-21 12:37:42,489 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2018-10-21 12:37:42,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:37:42,521 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2018-10-21 12:37:42,521 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-21 12:37:42,523 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2018-10-21 12:37:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:37:42,537 INFO L225 Difference]: With dead ends: 45 [2018-10-21 12:37:42,538 INFO L226 Difference]: Without dead ends: 19 [2018-10-21 12:37:42,542 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 [2018-10-21 12:37:42,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-21 12:37:42,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-21 12:37:42,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-21 12:37:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-10-21 12:37:42,582 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2018-10-21 12:37:42,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:37:42,583 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2018-10-21 12:37:42,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-21 12:37:42,583 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2018-10-21 12:37:42,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-21 12:37:42,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:37:42,584 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:37:42,584 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:37:42,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:37:42,586 INFO L82 PathProgramCache]: Analyzing trace with hash 800081396, now seen corresponding path program 1 times [2018-10-21 12:37:42,586 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:37:42,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:42,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:37:42,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:42,587 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:37:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:37:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:42,817 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:37:42,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-21 12:37:42,817 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:37:42,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-21 12:37:42,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-21 12:37:42,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-21 12:37:42,821 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2018-10-21 12:37:42,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:37:42,967 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2018-10-21 12:37:42,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-21 12:37:42,968 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2018-10-21 12:37:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:37:42,969 INFO L225 Difference]: With dead ends: 32 [2018-10-21 12:37:42,969 INFO L226 Difference]: Without dead ends: 26 [2018-10-21 12:37:42,970 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-21 12:37:42,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-21 12:37:42,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-21 12:37:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-21 12:37:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-21 12:37:42,976 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2018-10-21 12:37:42,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:37:42,976 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-21 12:37:42,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-21 12:37:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-21 12:37:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-21 12:37:42,978 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:37:42,978 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:37:42,978 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:37:42,979 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:37:42,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1097925811, now seen corresponding path program 1 times [2018-10-21 12:37:42,979 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:37:42,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:42,980 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:37:42,981 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:42,981 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:37:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:37:43,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-21 12:37:43,087 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-21 12:37:43,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-21 12:37:43,087 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:37:43,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-21 12:37:43,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-21 12:37:43,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-21 12:37:43,088 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2018-10-21 12:37:43,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:37:43,266 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-10-21 12:37:43,267 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-21 12:37:43,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-10-21 12:37:43,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:37:43,270 INFO L225 Difference]: With dead ends: 35 [2018-10-21 12:37:43,270 INFO L226 Difference]: Without dead ends: 29 [2018-10-21 12:37:43,271 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-21 12:37:43,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-21 12:37:43,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2018-10-21 12:37:43,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-21 12:37:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-10-21 12:37:43,280 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 21 [2018-10-21 12:37:43,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:37:43,282 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-10-21 12:37:43,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-21 12:37:43,282 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2018-10-21 12:37:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-21 12:37:43,283 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:37:43,283 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:37:43,283 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:37:43,284 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:37:43,285 INFO L82 PathProgramCache]: Analyzing trace with hash -278190259, now seen corresponding path program 1 times [2018-10-21 12:37:43,285 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:37:43,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:43,286 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:37:43,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:43,286 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:37:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:37:43,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:43,463 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:37:43,463 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:37:43,464 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 22 with the following transitions: [2018-10-21 12:37:43,466 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [10], [12], [15], [26], [30], [32], [35], [37], [45], [49], [52], [54], [60], [61], [62], [64] [2018-10-21 12:37:43,520 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-21 12:37:43,520 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-21 12:37:43,963 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-21 12:37:43,965 INFO L272 AbstractInterpreter]: Visited 18 different actions 81 times. Merged at 5 different actions 42 times. Widened at 1 different actions 5 times. Found 4 fixpoints after 2 different actions. Largest state had 6 variables. [2018-10-21 12:37:44,009 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:37:44,009 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-21 12:37:44,103 INFO L232 lantSequenceWeakener]: Weakened 2 states. On average, predicates are now at 50% of their original sizes. [2018-10-21 12:37:44,103 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-21 12:37:44,502 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-21 12:37:44,502 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-21 12:37:44,503 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2018-10-21 12:37:44,503 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:37:44,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-21 12:37:44,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-21 12:37:44,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-10-21 12:37:44,504 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2018-10-21 12:37:45,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:37:45,413 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-10-21 12:37:45,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-21 12:37:45,413 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2018-10-21 12:37:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:37:45,414 INFO L225 Difference]: With dead ends: 49 [2018-10-21 12:37:45,414 INFO L226 Difference]: Without dead ends: 32 [2018-10-21 12:37:45,416 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-10-21 12:37:45,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-21 12:37:45,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2018-10-21 12:37:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-21 12:37:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-10-21 12:37:45,421 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2018-10-21 12:37:45,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:37:45,422 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-10-21 12:37:45,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-21 12:37:45,422 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-10-21 12:37:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-21 12:37:45,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-21 12:37:45,424 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-21 12:37:45,424 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-21 12:37:45,424 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:37:45,425 INFO L82 PathProgramCache]: Analyzing trace with hash -597656530, now seen corresponding path program 1 times [2018-10-21 12:37:45,425 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-21 12:37:45,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:45,427 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-21 12:37:45,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-21 12:37:45,427 INFO L295 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-21 12:37:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-21 12:37:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-21 12:37:45,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-21 12:37:45,533 INFO L197 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-21 12:37:45,533 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-10-21 12:37:45,534 INFO L202 CegarAbsIntRunner]: [0], [4], [6], [10], [12], [15], [17], [26], [30], [32], [35], [37], [45], [49], [52], [54], [60], [61], [62], [64] [2018-10-21 12:37:45,536 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-21 12:37:45,536 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-21 12:37:45,822 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-21 12:37:45,822 INFO L272 AbstractInterpreter]: Visited 19 different actions 146 times. Merged at 10 different actions 89 times. Widened at 3 different actions 11 times. Found 13 fixpoints after 4 different actions. Largest state had 7 variables. [2018-10-21 12:37:45,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-21 12:37:45,840 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-21 12:37:45,882 INFO L232 lantSequenceWeakener]: Weakened 2 states. On average, predicates are now at 50% of their original sizes. [2018-10-21 12:37:45,882 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-21 12:37:46,003 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-21 12:37:46,003 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-21 12:37:46,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2018-10-21 12:37:46,004 INFO L265 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-21 12:37:46,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-21 12:37:46,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-21 12:37:46,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2018-10-21 12:37:46,005 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2018-10-21 12:37:46,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-21 12:37:46,638 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2018-10-21 12:37:46,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-21 12:37:46,638 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2018-10-21 12:37:46,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-21 12:37:46,639 INFO L225 Difference]: With dead ends: 25 [2018-10-21 12:37:46,639 INFO L226 Difference]: Without dead ends: 0 [2018-10-21 12:37:46,641 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2018-10-21 12:37:46,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-21 12:37:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-21 12:37:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-21 12:37:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-21 12:37:46,642 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2018-10-21 12:37:46,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-21 12:37:46,642 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-21 12:37:46,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-21 12:37:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-21 12:37:46,643 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-21 12:37:46,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-21 12:37:46,770 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2018-10-21 12:37:46,771 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:37:46,771 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-21 12:37:46,771 INFO L428 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2018-10-21 12:37:46,771 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-21 12:37:46,771 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-21 12:37:46,771 INFO L425 ceAbstractionStarter]: For program point L25(lines 10 28) no Hoare annotation was computed. [2018-10-21 12:37:46,771 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 10 28) no Hoare annotation was computed. [2018-10-21 12:37:46,772 INFO L425 ceAbstractionStarter]: For program point L21(lines 21 24) no Hoare annotation was computed. [2018-10-21 12:37:46,773 INFO L425 ceAbstractionStarter]: For program point L21-1(lines 21 24) no Hoare annotation was computed. [2018-10-21 12:37:46,773 INFO L425 ceAbstractionStarter]: For program point L21-3(lines 20 24) no Hoare annotation was computed. [2018-10-21 12:37:46,773 INFO L425 ceAbstractionStarter]: For program point L21-4(lines 10 28) no Hoare annotation was computed. [2018-10-21 12:37:46,773 INFO L425 ceAbstractionStarter]: For program point L15(lines 15 17) no Hoare annotation was computed. [2018-10-21 12:37:46,773 INFO L425 ceAbstractionStarter]: For program point L15-1(lines 15 17) no Hoare annotation was computed. [2018-10-21 12:37:46,773 INFO L425 ceAbstractionStarter]: For program point mainFINAL(lines 10 28) no Hoare annotation was computed. [2018-10-21 12:37:46,774 INFO L425 ceAbstractionStarter]: For program point L15-3(lines 14 17) no Hoare annotation was computed. [2018-10-21 12:37:46,775 INFO L425 ceAbstractionStarter]: For program point L15-4(lines 10 28) no Hoare annotation was computed. [2018-10-21 12:37:46,775 INFO L428 ceAbstractionStarter]: At program point mainENTRY(lines 10 28) the Hoare annotation is: true [2018-10-21 12:37:46,775 INFO L421 ceAbstractionStarter]: At program point L26(line 26) the Hoare annotation is: (or (<= main_~i~0 99) (and (<= main_~i~0 (+ main_~j~0 100)) (<= main_~j~0 main_~i~0) (<= (* 2 main_~i~0) 398))) [2018-10-21 12:37:46,776 INFO L425 ceAbstractionStarter]: For program point L26-1(line 26) no Hoare annotation was computed. [2018-10-21 12:37:46,776 INFO L425 ceAbstractionStarter]: For program point L12(lines 12 13) no Hoare annotation was computed. [2018-10-21 12:37:46,776 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-21 12:37:46,776 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2018-10-21 12:37:46,776 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2018-10-21 12:37:46,776 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-21 12:37:46,777 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-21 12:37:46,778 INFO L425 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2018-10-21 12:37:46,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 12:37:46 BoogieIcfgContainer [2018-10-21 12:37:46,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-21 12:37:46,782 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-10-21 12:37:46,783 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-10-21 12:37:46,783 INFO L276 PluginConnector]: Witness Printer initialized [2018-10-21 12:37:46,784 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 12:37:42" (3/4) ... [2018-10-21 12:37:46,788 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-10-21 12:37:46,795 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2018-10-21 12:37:46,795 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2018-10-21 12:37:46,795 INFO L333 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2018-10-21 12:37:46,799 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2018-10-21 12:37:46,800 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2018-10-21 12:37:46,800 INFO L846 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-10-21 12:37:46,844 INFO L145 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/witness.graphml [2018-10-21 12:37:46,844 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-10-21 12:37:46,845 INFO L168 Benchmark]: Toolchain (without parser) took 5313.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 947.8 MB in the beginning and 899.9 MB in the end (delta: 48.0 MB). Peak memory consumption was 178.0 MB. Max. memory is 11.5 GB. [2018-10-21 12:37:46,847 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:37:46,848 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.96 ms. Allocated memory is still 1.0 GB. Free memory was 947.8 MB in the beginning and 937.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-10-21 12:37:46,849 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.97 ms. Allocated memory is still 1.0 GB. Free memory is still 937.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:37:46,849 INFO L168 Benchmark]: Boogie Preprocessor took 22.15 ms. Allocated memory is still 1.0 GB. Free memory is still 937.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:37:46,850 INFO L168 Benchmark]: RCFGBuilder took 377.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -170.0 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. [2018-10-21 12:37:46,850 INFO L168 Benchmark]: TraceAbstraction took 4539.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 899.9 MB in the end (delta: 207.2 MB). Peak memory consumption was 207.2 MB. Max. memory is 11.5 GB. [2018-10-21 12:37:46,851 INFO L168 Benchmark]: Witness Printer took 62.12 ms. Allocated memory is still 1.2 GB. Free memory is still 899.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-10-21 12:37:46,855 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 973.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 284.96 ms. Allocated memory is still 1.0 GB. Free memory was 947.8 MB in the beginning and 937.1 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 20.97 ms. Allocated memory is still 1.0 GB. Free memory is still 937.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 22.15 ms. Allocated memory is still 1.0 GB. Free memory is still 937.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 377.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.0 MB). Free memory was 937.1 MB in the beginning and 1.1 GB in the end (delta: -170.0 MB). Peak memory consumption was 26.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 4539.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 899.9 MB in the end (delta: 207.2 MB). Peak memory consumption was 207.2 MB. Max. memory is 11.5 GB. * Witness Printer took 62.12 ms. Allocated memory is still 1.2 GB. Free memory is still 899.9 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. SAFE Result, 4.4s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 1.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.1s HoareAnnotationTime, HoareTripleCheckerStatistics: 81 SDtfs, 36 SDslu, 193 SDs, 0 SdLazy, 83 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 4 DeclaredPredicates, 66 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.8s AbstIntTime, 2 AbstIntIterations, 2 AbstIntStrong, 0.9374307862679956 AbsIntWeakeningRatio, 0.3953488372093023 AbsIntAvgWeakeningVarsNumRemoved, 0.5581395348837209 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 23 HoareAnnotationTreeSize, 10 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 75 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 93 ConstructedInterpolants, 0 QuantifiedInterpolants, 3783 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 3/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...