java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-07 16:33:24,052 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-07 16:33:24,054 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-07 16:33:24,073 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-07 16:33:24,073 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-07 16:33:24,074 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-07 16:33:24,075 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-07 16:33:24,077 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-07 16:33:24,079 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-07 16:33:24,080 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-07 16:33:24,081 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-07 16:33:24,081 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-07 16:33:24,082 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-07 16:33:24,083 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-07 16:33:24,084 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-07 16:33:24,085 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-07 16:33:24,086 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-07 16:33:24,088 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-07 16:33:24,089 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-07 16:33:24,091 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-07 16:33:24,092 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-07 16:33:24,093 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-07 16:33:24,096 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-07 16:33:24,096 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-07 16:33:24,097 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-07 16:33:24,098 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-07 16:33:24,099 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-07 16:33:24,099 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-07 16:33:24,100 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-07 16:33:24,101 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-07 16:33:24,102 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-07 16:33:24,102 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-07 16:33:24,103 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-07 16:33:24,103 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-07 16:33:24,104 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-07 16:33:24,105 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-07 16:33:24,105 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-INT.epf [2018-11-07 16:33:24,120 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-07 16:33:24,121 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-07 16:33:24,122 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-07 16:33:24,122 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-07 16:33:24,122 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-11-07 16:33:24,122 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-07 16:33:24,122 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-07 16:33:24,123 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-07 16:33:24,123 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-07 16:33:24,123 INFO L133 SettingsManager]: * Log string format=TERM [2018-11-07 16:33:24,123 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-07 16:33:24,123 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-07 16:33:24,124 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-07 16:33:24,124 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-07 16:33:24,124 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-07 16:33:24,125 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-07 16:33:24,125 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-07 16:33:24,125 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-07 16:33:24,125 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-07 16:33:24,125 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-07 16:33:24,126 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-07 16:33:24,126 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-07 16:33:24,126 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-07 16:33:24,126 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-07 16:33:24,126 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-07 16:33:24,127 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-07 16:33:24,127 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-07 16:33:24,127 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-07 16:33:24,127 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-07 16:33:24,127 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-07 16:33:24,128 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-07 16:33:24,128 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-07 16:33:24,128 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-07 16:33:24,128 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-11-07 16:33:24,171 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-07 16:33:24,184 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-07 16:33:24,188 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-07 16:33:24,189 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-07 16:33:24,190 INFO L276 PluginConnector]: CDTParser initialized [2018-11-07 16:33:24,190 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-11-07 16:33:24,253 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/422efbd30/dcc68340978c4ec3b9014e901b308271/FLAG05bad6cef [2018-11-07 16:33:24,698 INFO L298 CDTParser]: Found 1 translation units. [2018-11-07 16:33:24,698 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-11-07 16:33:24,704 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/422efbd30/dcc68340978c4ec3b9014e901b308271/FLAG05bad6cef [2018-11-07 16:33:24,719 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/422efbd30/dcc68340978c4ec3b9014e901b308271 [2018-11-07 16:33:24,733 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-07 16:33:24,735 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-07 16:33:24,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-07 16:33:24,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-07 16:33:24,746 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-07 16:33:24,747 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:33:24" (1/1) ... [2018-11-07 16:33:24,750 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56927dda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:24, skipping insertion in model container [2018-11-07 16:33:24,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:33:24" (1/1) ... [2018-11-07 16:33:24,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-07 16:33:24,784 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-07 16:33:25,015 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 16:33:25,019 INFO L189 MainTranslator]: Completed pre-run [2018-11-07 16:33:25,039 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-07 16:33:25,058 INFO L193 MainTranslator]: Completed translation [2018-11-07 16:33:25,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:25 WrapperNode [2018-11-07 16:33:25,059 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-07 16:33:25,060 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-07 16:33:25,060 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-07 16:33:25,060 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-07 16:33:25,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:25" (1/1) ... [2018-11-07 16:33:25,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:25" (1/1) ... [2018-11-07 16:33:25,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-07 16:33:25,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-07 16:33:25,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-07 16:33:25,083 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-07 16:33:25,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:25" (1/1) ... [2018-11-07 16:33:25,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:25" (1/1) ... [2018-11-07 16:33:25,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:25" (1/1) ... [2018-11-07 16:33:25,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:25" (1/1) ... [2018-11-07 16:33:25,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:25" (1/1) ... [2018-11-07 16:33:25,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:25" (1/1) ... [2018-11-07 16:33:25,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:25" (1/1) ... [2018-11-07 16:33:25,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-07 16:33:25,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-07 16:33:25,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-07 16:33:25,114 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-07 16:33:25,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 16:33:25,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-11-07 16:33:25,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-11-07 16:33:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-07 16:33:25,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-07 16:33:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-11-07 16:33:25,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-11-07 16:33:25,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-11-07 16:33:25,252 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-11-07 16:33:25,496 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-07 16:33:25,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:33:25 BoogieIcfgContainer [2018-11-07 16:33:25,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-07 16:33:25,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-07 16:33:25,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-07 16:33:25,501 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-07 16:33:25,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:33:24" (1/3) ... [2018-11-07 16:33:25,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4277d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:33:25, skipping insertion in model container [2018-11-07 16:33:25,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:33:25" (2/3) ... [2018-11-07 16:33:25,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4277d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:33:25, skipping insertion in model container [2018-11-07 16:33:25,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:33:25" (3/3) ... [2018-11-07 16:33:25,504 INFO L112 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case_false-unreach-call_true-termination.i [2018-11-07 16:33:25,514 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-07 16:33:25,522 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-07 16:33:25,542 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-07 16:33:25,584 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-07 16:33:25,584 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-07 16:33:25,584 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-07 16:33:25,584 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-07 16:33:25,585 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-07 16:33:25,585 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-07 16:33:25,585 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-07 16:33:25,585 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-07 16:33:25,606 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2018-11-07 16:33:25,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-07 16:33:25,613 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:33:25,614 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:33:25,617 INFO L423 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:33:25,623 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:25,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2018-11-07 16:33:25,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:33:25,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:25,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:33:25,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:25,686 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:33:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:33:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:25,771 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 16:33:25,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-07 16:33:25,772 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 16:33:25,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-07 16:33:25,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-07 16:33:25,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-07 16:33:25,793 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2018-11-07 16:33:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:33:25,813 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-11-07 16:33:25,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-07 16:33:25,814 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2018-11-07 16:33:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:33:25,823 INFO L225 Difference]: With dead ends: 31 [2018-11-07 16:33:25,823 INFO L226 Difference]: Without dead ends: 14 [2018-11-07 16:33:25,827 INFO L604 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 [2018-11-07 16:33:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-11-07 16:33:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-11-07 16:33:25,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-11-07 16:33:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2018-11-07 16:33:25,860 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2018-11-07 16:33:25,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:33:25,860 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2018-11-07 16:33:25,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-07 16:33:25,860 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2018-11-07 16:33:25,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-11-07 16:33:25,861 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:33:25,861 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:33:25,862 INFO L423 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:33:25,862 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:25,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1143179357, now seen corresponding path program 1 times [2018-11-07 16:33:25,863 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:33:25,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:25,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:33:25,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:25,865 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:33:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:33:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:25,988 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 16:33:25,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-07 16:33:25,989 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 16:33:25,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 16:33:25,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 16:33:25,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-07 16:33:25,992 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2018-11-07 16:33:26,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:33:26,098 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2018-11-07 16:33:26,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-07 16:33:26,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2018-11-07 16:33:26,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:33:26,100 INFO L225 Difference]: With dead ends: 21 [2018-11-07 16:33:26,101 INFO L226 Difference]: Without dead ends: 16 [2018-11-07 16:33:26,102 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-11-07 16:33:26,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-11-07 16:33:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-11-07 16:33:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-11-07 16:33:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2018-11-07 16:33:26,108 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2018-11-07 16:33:26,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:33:26,108 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2018-11-07 16:33:26,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 16:33:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2018-11-07 16:33:26,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-07 16:33:26,109 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:33:26,109 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:33:26,110 INFO L423 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:33:26,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:26,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1652058138, now seen corresponding path program 1 times [2018-11-07 16:33:26,110 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:33:26,111 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:26,111 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:33:26,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:26,112 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:33:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:33:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:26,174 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-07 16:33:26,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-07 16:33:26,175 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-07 16:33:26,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-07 16:33:26,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-07 16:33:26,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-07 16:33:26,176 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 3 states. [2018-11-07 16:33:26,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:33:26,224 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2018-11-07 16:33:26,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-07 16:33:26,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2018-11-07 16:33:26,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:33:26,227 INFO L225 Difference]: With dead ends: 27 [2018-11-07 16:33:26,227 INFO L226 Difference]: Without dead ends: 18 [2018-11-07 16:33:26,227 INFO L604 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 [2018-11-07 16:33:26,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-07 16:33:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-11-07 16:33:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-07 16:33:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-11-07 16:33:26,233 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2018-11-07 16:33:26,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:33:26,234 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2018-11-07 16:33:26,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-07 16:33:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2018-11-07 16:33:26,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-11-07 16:33:26,235 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:33:26,235 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:33:26,236 INFO L423 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:33:26,236 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:26,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1833562532, now seen corresponding path program 1 times [2018-11-07 16:33:26,237 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:33:26,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:26,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:33:26,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:26,238 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:33:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:33:26,734 WARN L179 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 7 [2018-11-07 16:33:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:26,828 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:33:26,828 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:33:26,829 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2018-11-07 16:33:26,831 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [18], [20], [26], [29], [31], [37], [38], [39], [41] [2018-11-07 16:33:26,863 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 16:33:26,864 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 16:33:26,955 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 16:33:27,145 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 16:33:27,149 INFO L272 AbstractInterpreter]: Visited 14 different actions 76 times. Merged at 5 different actions 35 times. Widened at 1 different actions 3 times. Found 1 fixpoints after 1 different actions. Largest state had 5 variables. [2018-11-07 16:33:27,162 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:27,164 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 16:33:27,164 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:33:27,164 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 16:33:27,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:33:27,179 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 16:33:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:33:27,211 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:33:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:27,511 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:33:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:27,833 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:33:27,833 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2018-11-07 16:33:27,833 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:33:27,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-07 16:33:27,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-07 16:33:27,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-11-07 16:33:27,836 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 12 states. [2018-11-07 16:33:28,240 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-11-07 16:33:28,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:33:28,461 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2018-11-07 16:33:28,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-07 16:33:28,462 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-11-07 16:33:28,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:33:28,463 INFO L225 Difference]: With dead ends: 30 [2018-11-07 16:33:28,463 INFO L226 Difference]: Without dead ends: 24 [2018-11-07 16:33:28,465 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-11-07 16:33:28,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-07 16:33:28,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-07 16:33:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-07 16:33:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-11-07 16:33:28,470 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 15 [2018-11-07 16:33:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:33:28,471 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-11-07 16:33:28,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-07 16:33:28,471 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-11-07 16:33:28,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-07 16:33:28,472 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:33:28,472 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:33:28,473 INFO L423 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:33:28,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:28,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1892022867, now seen corresponding path program 1 times [2018-11-07 16:33:28,473 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:33:28,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:28,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:33:28,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:28,475 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:33:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:33:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:28,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:33:28,527 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:33:28,527 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-11-07 16:33:28,528 INFO L202 CegarAbsIntRunner]: [0], [4], [8], [11], [13], [16], [18], [20], [26], [29], [31], [37], [38], [39], [41] [2018-11-07 16:33:28,529 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, IntervalDomain] [2018-11-07 16:33:28,530 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-11-07 16:33:28,534 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-11-07 16:33:28,662 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-11-07 16:33:28,662 INFO L272 AbstractInterpreter]: Visited 15 different actions 95 times. Merged at 6 different actions 41 times. Widened at 1 different actions 3 times. Found 7 fixpoints after 2 different actions. Largest state had 5 variables. [2018-11-07 16:33:28,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:28,673 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-11-07 16:33:28,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:33:28,673 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:33:28,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:33:28,685 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-11-07 16:33:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:33:28,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:33:28,701 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:28,702 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:33:28,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:28,779 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:33:28,779 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2018-11-07 16:33:28,779 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:33:28,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-07 16:33:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-07 16:33:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-07 16:33:28,781 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2018-11-07 16:33:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:33:28,818 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2018-11-07 16:33:28,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-07 16:33:28,819 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2018-11-07 16:33:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:33:28,820 INFO L225 Difference]: With dead ends: 33 [2018-11-07 16:33:28,820 INFO L226 Difference]: Without dead ends: 24 [2018-11-07 16:33:28,821 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-07 16:33:28,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-07 16:33:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-11-07 16:33:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-11-07 16:33:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2018-11-07 16:33:28,826 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19 [2018-11-07 16:33:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:33:28,826 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2018-11-07 16:33:28,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-07 16:33:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2018-11-07 16:33:28,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-07 16:33:28,828 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:33:28,828 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:33:28,828 INFO L423 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:33:28,828 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:28,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1658992628, now seen corresponding path program 2 times [2018-11-07 16:33:28,829 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:33:28,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:28,830 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-07 16:33:28,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:28,830 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:33:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:33:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:28,879 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:33:28,879 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:33:28,879 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:33:28,880 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:33:28,880 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:33:28,880 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-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 [2018-11-07 16:33:28,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 16:33:28,896 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 16:33:28,910 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-07 16:33:28,910 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 16:33:28,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:33:28,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:28,919 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:33:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:28,987 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:33:28,987 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2018-11-07 16:33:28,987 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:33:28,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-07 16:33:28,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-07 16:33:28,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-07 16:33:28,989 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 5 states. [2018-11-07 16:33:29,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:33:29,033 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-11-07 16:33:29,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-07 16:33:29,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2018-11-07 16:33:29,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:33:29,040 INFO L225 Difference]: With dead ends: 35 [2018-11-07 16:33:29,040 INFO L226 Difference]: Without dead ends: 26 [2018-11-07 16:33:29,040 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-11-07 16:33:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-07 16:33:29,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2018-11-07 16:33:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-11-07 16:33:29,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-11-07 16:33:29,046 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2018-11-07 16:33:29,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:33:29,046 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2018-11-07 16:33:29,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-07 16:33:29,047 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2018-11-07 16:33:29,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-11-07 16:33:29,048 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:33:29,048 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:33:29,048 INFO L423 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:33:29,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:29,048 INFO L82 PathProgramCache]: Analyzing trace with hash 849646002, now seen corresponding path program 2 times [2018-11-07 16:33:29,048 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:33:29,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:29,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 16:33:29,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:29,050 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:33:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-07 16:33:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-11-07 16:33:29,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:33:29,524 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-07 16:33:29,524 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-11-07 16:33:29,524 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-11-07 16:33:29,524 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-07 16:33:29,524 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-07 16:33:29,533 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-07 16:33:29,533 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-11-07 16:33:29,573 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-11-07 16:33:29,573 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-07 16:33:29,575 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-07 16:33:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:29,828 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-07 16:33:30,161 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-07 16:33:30,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-11-07 16:33:30,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 27 [2018-11-07 16:33:30,181 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-11-07 16:33:30,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-07 16:33:30,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-07 16:33:30,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2018-11-07 16:33:30,183 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 17 states. [2018-11-07 16:33:30,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-07 16:33:30,779 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-11-07 16:33:30,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-07 16:33:30,779 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 23 [2018-11-07 16:33:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-07 16:33:30,780 INFO L225 Difference]: With dead ends: 38 [2018-11-07 16:33:30,781 INFO L226 Difference]: Without dead ends: 32 [2018-11-07 16:33:30,782 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2018-11-07 16:33:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-11-07 16:33:30,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2018-11-07 16:33:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-07 16:33:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2018-11-07 16:33:30,788 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2018-11-07 16:33:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-07 16:33:30,788 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2018-11-07 16:33:30,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-07 16:33:30,789 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2018-11-07 16:33:30,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-11-07 16:33:30,789 INFO L367 BasicCegarLoop]: Found error trace [2018-11-07 16:33:30,790 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-07 16:33:30,790 INFO L423 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-07 16:33:30,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-07 16:33:30,790 INFO L82 PathProgramCache]: Analyzing trace with hash -418779461, now seen corresponding path program 3 times [2018-11-07 16:33:30,790 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-07 16:33:30,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:30,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-07 16:33:30,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-07 16:33:30,792 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-07 16:33:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-07 16:33:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-07 16:33:30,831 INFO L442 BasicCegarLoop]: Counterexample might be feasible [2018-11-07 16:33:30,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 04:33:30 BoogieIcfgContainer [2018-11-07 16:33:30,858 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-07 16:33:30,859 INFO L168 Benchmark]: Toolchain (without parser) took 6124.33 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.4 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -463.2 MB). Peak memory consumption was 289.2 MB. Max. memory is 7.1 GB. [2018-11-07 16:33:30,860 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 16:33:30,861 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.58 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-11-07 16:33:30,862 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 16:33:30,862 INFO L168 Benchmark]: Boogie Preprocessor took 31.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-07 16:33:30,863 INFO L168 Benchmark]: RCFGBuilder took 382.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -802.5 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. [2018-11-07 16:33:30,864 INFO L168 Benchmark]: TraceAbstraction took 5360.21 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 328.8 MB). Peak memory consumption was 328.8 MB. Max. memory is 7.1 GB. [2018-11-07 16:33:30,869 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.58 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 22.13 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 31.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 382.90 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 752.4 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -802.5 MB). Peak memory consumption was 25.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5360.21 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 328.8 MB). Peak memory consumption was 328.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 VAL [i=1, n=4, n=0] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=1, n=4, n=2] [L15] COND FALSE !(i==4) VAL [i=1, n=4, n=2] [L13] i++ VAL [i=2, n=4, n=2] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=2, n=4, n=4] [L15] COND FALSE !(i==4) VAL [i=2, n=4, n=4] [L13] i++ VAL [i=3, n=4, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=3, n=4, n=6] [L15] COND FALSE !(i==4) VAL [i=3, n=4, n=6] [L13] i++ VAL [i=4, n=6, n=4] [L13] COND TRUE i<=n [L14] sn = sn + (2) VAL [i=4, n=8, n=4] [L15] COND TRUE i==4 [L15] sn=-10 VAL [i=4, n=-10, n=4] [L13] i++ VAL [i=5, n=4, n=-10] [L13] COND FALSE !(i<=n) VAL [i=5, n=-10, n=4] [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. UNSAFE Result, 5.2s OverallTime, 8 OverallIterations, 5 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 92 SDtfs, 21 SDslu, 279 SDs, 0 SdLazy, 286 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 138 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.4s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 223 NumberOfCodeBlocks, 223 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 261 ConstructedInterpolants, 12 QuantifiedInterpolants, 24641 SizeOfPredicates, 10 NumberOfNonLiveVariables, 177 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 49/140 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...