java -Xmx8000000000 -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 ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/nested_true-unreach-call.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 16:13:42,514 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 16:13:42,516 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 16:13:42,532 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 16:13:42,533 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 16:13:42,534 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 16:13:42,535 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 16:13:42,537 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 16:13:42,539 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 16:13:42,540 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 16:13:42,541 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 16:13:42,541 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 16:13:42,542 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 16:13:42,543 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 16:13:42,544 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 16:13:42,545 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 16:13:42,546 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 16:13:42,548 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 16:13:42,550 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 16:13:42,552 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 16:13:42,553 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 16:13:42,555 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 16:13:42,557 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-23 16:13:42,558 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-23 16:13:42,558 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-23 16:13:42,559 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-23 16:13:42,560 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-23 16:13:42,561 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-23 16:13:42,562 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-23 16:13:42,563 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-23 16:13:42,563 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-23 16:13:42,564 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-23 16:13:42,567 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-23 16:13:42,590 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 16:13:42,590 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 16:13:42,591 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 16:13:42,591 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 16:13:42,591 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 16:13:42,592 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 16:13:42,592 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 16:13:42,592 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 16:13:42,592 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 16:13:42,592 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 16:13:42,592 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 16:13:42,593 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 16:13:42,594 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 16:13:42,594 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 16:13:42,594 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 16:13:42,594 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 16:13:42,596 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 16:13:42,596 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 16:13:42,596 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 16:13:42,596 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 16:13:42,597 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 16:13:42,597 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 16:13:42,597 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 16:13:42,597 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 16:13:42,597 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 16:13:42,598 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 16:13:42,598 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 16:13:42,598 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 16:13:42,599 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 16:13:42,599 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 16:13:42,599 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 16:13:42,599 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 16:13:42,599 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 16:13:42,600 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 16:13:42,655 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 16:13:42,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 16:13:42,672 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 16:13:42,673 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 16:13:42,674 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 16:13:42,674 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-industry-pattern/nested_true-unreach-call.c [2018-10-23 16:13:42,741 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/acd6023f0/4b242825680245aca8b10fdd625dc47d/FLAGe7c70e6b8 [2018-10-23 16:13:43,209 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 16:13:43,210 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/nested_true-unreach-call.c [2018-10-23 16:13:43,219 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/acd6023f0/4b242825680245aca8b10fdd625dc47d/FLAGe7c70e6b8 [2018-10-23 16:13:43,238 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/acd6023f0/4b242825680245aca8b10fdd625dc47d [2018-10-23 16:13:43,255 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 16:13:43,256 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 16:13:43,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 16:13:43,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 16:13:43,263 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 16:13:43,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 04:13:43" (1/1) ... [2018-10-23 16:13:43,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60da32e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 04:13:43, skipping insertion in model container [2018-10-23 16:13:43,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 04:13:43" (1/1) ... [2018-10-23 16:13:43,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 16:13:43,310 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 16:13:43,550 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 16:13:43,555 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 16:13:43,582 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 16:13:43,596 INFO L193 MainTranslator]: Completed translation [2018-10-23 16:13:43,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 04:13:43 WrapperNode [2018-10-23 16:13:43,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 16:13:43,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 16:13:43,598 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 16:13:43,599 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 16:13:43,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 04:13:43" (1/1) ... [2018-10-23 16:13:43,613 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 04:13:43" (1/1) ... [2018-10-23 16:13:43,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 16:13:43,619 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 16:13:43,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 16:13:43,619 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 16:13:43,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 04:13:43" (1/1) ... [2018-10-23 16:13:43,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 04:13:43" (1/1) ... [2018-10-23 16:13:43,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 04:13:43" (1/1) ... [2018-10-23 16:13:43,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 04:13:43" (1/1) ... [2018-10-23 16:13:43,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 04:13:43" (1/1) ... [2018-10-23 16:13:43,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 04:13:43" (1/1) ... [2018-10-23 16:13:43,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 04:13:43" (1/1) ... [2018-10-23 16:13:43,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 16:13:43,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 16:13:43,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 16:13:43,642 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 16:13:43,643 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 04:13:43" (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 [2018-10-23 16:13:43,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 16:13:43,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 16:13:43,774 INFO L130 BoogieDeclarations]: Found specification of procedure nondet [2018-10-23 16:13:43,774 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet [2018-10-23 16:13:43,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 16:13:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 16:13:43,775 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 16:13:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 16:13:43,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-23 16:13:43,775 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-23 16:13:44,147 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 16:13:44,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 04:13:44 BoogieIcfgContainer [2018-10-23 16:13:44,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 16:13:44,152 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 16:13:44,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 16:13:44,158 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 16:13:44,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 04:13:43" (1/3) ... [2018-10-23 16:13:44,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264fe432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 04:13:44, skipping insertion in model container [2018-10-23 16:13:44,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 04:13:43" (2/3) ... [2018-10-23 16:13:44,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264fe432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 04:13:44, skipping insertion in model container [2018-10-23 16:13:44,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 04:13:44" (3/3) ... [2018-10-23 16:13:44,165 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_true-unreach-call.c [2018-10-23 16:13:44,175 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 16:13:44,182 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 16:13:44,197 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 16:13:44,240 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 16:13:44,241 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 16:13:44,241 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 16:13:44,241 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 16:13:44,241 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 16:13:44,241 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 16:13:44,242 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 16:13:44,242 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 16:13:44,260 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-10-23 16:13:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-23 16:13:44,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 16:13:44,268 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 16:13:44,270 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 16:13:44,276 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:44,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1030098894, now seen corresponding path program 1 times [2018-10-23 16:13:44,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 16:13:44,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:44,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 16:13:44,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:44,328 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 16:13:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 16:13:44,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 16:13:44,407 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 16:13:44,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 16:13:44,407 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 16:13:44,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 16:13:44,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 16:13:44,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 16:13:44,435 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-10-23 16:13:44,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 16:13:44,460 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2018-10-23 16:13:44,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 16:13:44,462 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2018-10-23 16:13:44,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 16:13:44,470 INFO L225 Difference]: With dead ends: 44 [2018-10-23 16:13:44,471 INFO L226 Difference]: Without dead ends: 25 [2018-10-23 16:13:44,475 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 [2018-10-23 16:13:44,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-23 16:13:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-23 16:13:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-23 16:13:44,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2018-10-23 16:13:44,520 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2018-10-23 16:13:44,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 16:13:44,521 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2018-10-23 16:13:44,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 16:13:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2018-10-23 16:13:44,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-23 16:13:44,523 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 16:13:44,523 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 16:13:44,524 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 16:13:44,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:44,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1176183033, now seen corresponding path program 1 times [2018-10-23 16:13:44,524 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 16:13:44,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:44,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 16:13:44,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:44,526 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 16:13:44,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 16:13:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 16:13:44,630 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 16:13:44,630 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 16:13:44,630 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 16:13:44,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 16:13:44,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 16:13:44,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 16:13:44,633 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 3 states. [2018-10-23 16:13:44,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 16:13:44,851 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2018-10-23 16:13:44,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 16:13:44,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2018-10-23 16:13:44,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 16:13:44,858 INFO L225 Difference]: With dead ends: 46 [2018-10-23 16:13:44,858 INFO L226 Difference]: Without dead ends: 31 [2018-10-23 16:13:44,861 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 16:13:44,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-23 16:13:44,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2018-10-23 16:13:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-23 16:13:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2018-10-23 16:13:44,881 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2018-10-23 16:13:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 16:13:44,881 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2018-10-23 16:13:44,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 16:13:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2018-10-23 16:13:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-23 16:13:44,882 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 16:13:44,882 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 16:13:44,883 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 16:13:44,883 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1045124110, now seen corresponding path program 1 times [2018-10-23 16:13:44,883 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 16:13:44,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:44,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 16:13:44,885 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:44,885 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 16:13:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 16:13:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 16:13:45,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 16:13:45,027 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 16:13:45,028 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-10-23 16:13:45,030 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [3], [8], [12], [18], [22], [25], [27], [32], [34], [40], [48], [55], [58], [60], [66], [67], [68], [70], [71], [72] [2018-10-23 16:13:45,091 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 16:13:45,091 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 16:13:45,409 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 16:13:45,411 INFO L272 AbstractInterpreter]: Visited 18 different actions 66 times. Merged at 4 different actions 38 times. Widened at 1 different actions 6 times. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-10-23 16:13:45,438 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:45,438 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 16:13:45,566 INFO L232 lantSequenceWeakener]: Weakened 18 states. On average, predicates are now at 62.04% of their original sizes. [2018-10-23 16:13:45,567 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 16:13:45,899 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 16:13:45,901 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 16:13:45,906 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2018-10-23 16:13:45,906 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 16:13:45,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 16:13:45,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 16:13:45,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 16:13:45,908 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2018-10-23 16:13:46,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 16:13:46,476 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2018-10-23 16:13:46,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 16:13:46,476 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-10-23 16:13:46,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 16:13:46,479 INFO L225 Difference]: With dead ends: 58 [2018-10-23 16:13:46,480 INFO L226 Difference]: Without dead ends: 41 [2018-10-23 16:13:46,480 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 16:13:46,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-23 16:13:46,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2018-10-23 16:13:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-23 16:13:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2018-10-23 16:13:46,497 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 24 [2018-10-23 16:13:46,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 16:13:46,498 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2018-10-23 16:13:46,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 16:13:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2018-10-23 16:13:46,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-23 16:13:46,499 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 16:13:46,499 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 16:13:46,500 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 16:13:46,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:46,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1102382412, now seen corresponding path program 1 times [2018-10-23 16:13:46,502 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 16:13:46,503 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:46,503 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 16:13:46,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:46,504 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 16:13:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 16:13:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 16:13:46,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 16:13:46,631 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 16:13:46,631 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-10-23 16:13:46,632 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [3], [8], [12], [18], [22], [25], [27], [32], [34], [42], [48], [55], [58], [60], [66], [67], [68], [70], [71], [72] [2018-10-23 16:13:46,634 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 16:13:46,634 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 16:13:46,733 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 16:13:46,733 INFO L272 AbstractInterpreter]: Visited 22 different actions 60 times. Merged at 4 different actions 30 times. Widened at 1 different actions 4 times. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-10-23 16:13:46,750 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:46,750 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 16:13:46,825 INFO L232 lantSequenceWeakener]: Weakened 22 states. On average, predicates are now at 60.23% of their original sizes. [2018-10-23 16:13:46,826 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 16:13:47,229 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 16:13:47,230 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 16:13:47,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [10] imperfect sequences [4] total 12 [2018-10-23 16:13:47,230 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 16:13:47,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 16:13:47,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 16:13:47,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2018-10-23 16:13:47,232 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 10 states. [2018-10-23 16:13:48,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 16:13:48,284 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2018-10-23 16:13:48,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 16:13:48,284 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-10-23 16:13:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 16:13:48,286 INFO L225 Difference]: With dead ends: 66 [2018-10-23 16:13:48,286 INFO L226 Difference]: Without dead ends: 49 [2018-10-23 16:13:48,287 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-23 16:13:48,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-23 16:13:48,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2018-10-23 16:13:48,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-23 16:13:48,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2018-10-23 16:13:48,298 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 24 [2018-10-23 16:13:48,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 16:13:48,299 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2018-10-23 16:13:48,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 16:13:48,299 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2018-10-23 16:13:48,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-23 16:13:48,300 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 16:13:48,301 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 16:13:48,301 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 16:13:48,301 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:48,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1438151120, now seen corresponding path program 1 times [2018-10-23 16:13:48,302 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 16:13:48,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:48,303 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 16:13:48,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:48,303 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 16:13:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 16:13:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 16:13:48,395 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 16:13:48,395 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 16:13:48,395 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-10-23 16:13:48,395 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [3], [8], [12], [18], [22], [25], [27], [30], [34], [40], [48], [55], [58], [60], [66], [67], [68], [70], [71], [72] [2018-10-23 16:13:48,397 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 16:13:48,398 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 16:13:48,417 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 16:13:48,418 INFO L272 AbstractInterpreter]: Visited 17 different actions 21 times. Merged at 3 different actions 3 times. Never widened. Found 1 fixpoints after 1 different actions. Largest state had 8 variables. [2018-10-23 16:13:48,420 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:48,420 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 16:13:48,463 INFO L232 lantSequenceWeakener]: Weakened 17 states. On average, predicates are now at 67.65% of their original sizes. [2018-10-23 16:13:48,464 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 16:13:48,757 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 16:13:48,758 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 16:13:48,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [4] total 8 [2018-10-23 16:13:48,758 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 16:13:48,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 16:13:48,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 16:13:48,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 16:13:48,760 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 6 states. [2018-10-23 16:13:49,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 16:13:49,189 INFO L93 Difference]: Finished difference Result 71 states and 87 transitions. [2018-10-23 16:13:49,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 16:13:49,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2018-10-23 16:13:49,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 16:13:49,193 INFO L225 Difference]: With dead ends: 71 [2018-10-23 16:13:49,193 INFO L226 Difference]: Without dead ends: 54 [2018-10-23 16:13:49,194 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-23 16:13:49,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-23 16:13:49,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2018-10-23 16:13:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-23 16:13:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2018-10-23 16:13:49,209 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 24 [2018-10-23 16:13:49,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 16:13:49,209 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2018-10-23 16:13:49,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 16:13:49,210 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2018-10-23 16:13:49,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-23 16:13:49,211 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 16:13:49,211 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 16:13:49,211 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 16:13:49,211 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:49,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1472263337, now seen corresponding path program 1 times [2018-10-23 16:13:49,212 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 16:13:49,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:49,213 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 16:13:49,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:49,213 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 16:13:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 16:13:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 16:13:49,332 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 16:13:49,332 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 16:13:49,333 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-10-23 16:13:49,333 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [3], [8], [12], [18], [22], [25], [27], [30], [32], [34], [40], [48], [55], [58], [60], [66], [67], [68], [70], [71], [72] [2018-10-23 16:13:49,335 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 16:13:49,335 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 16:13:49,442 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 16:13:49,442 INFO L272 AbstractInterpreter]: Visited 23 different actions 95 times. Merged at 6 different actions 51 times. Widened at 1 different actions 7 times. Found 13 fixpoints after 4 different actions. Largest state had 8 variables. [2018-10-23 16:13:49,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:49,480 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 16:13:49,528 INFO L232 lantSequenceWeakener]: Weakened 26 states. On average, predicates are now at 58.01% of their original sizes. [2018-10-23 16:13:49,529 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 16:13:50,269 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 16:13:50,269 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 16:13:50,269 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 15 [2018-10-23 16:13:50,270 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 16:13:50,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 16:13:50,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 16:13:50,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-10-23 16:13:50,272 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 12 states. [2018-10-23 16:13:51,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 16:13:51,063 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2018-10-23 16:13:51,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 16:13:51,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-23 16:13:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 16:13:51,066 INFO L225 Difference]: With dead ends: 78 [2018-10-23 16:13:51,066 INFO L226 Difference]: Without dead ends: 61 [2018-10-23 16:13:51,067 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-10-23 16:13:51,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-23 16:13:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2018-10-23 16:13:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-23 16:13:51,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2018-10-23 16:13:51,080 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 28 [2018-10-23 16:13:51,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 16:13:51,081 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2018-10-23 16:13:51,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 16:13:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2018-10-23 16:13:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-23 16:13:51,082 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 16:13:51,083 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 16:13:51,083 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 16:13:51,083 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:51,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1415005035, now seen corresponding path program 1 times [2018-10-23 16:13:51,084 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 16:13:51,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:51,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 16:13:51,085 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:51,085 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 16:13:51,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 16:13:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 16:13:51,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 16:13:51,340 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 16:13:51,340 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-10-23 16:13:51,340 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [3], [8], [12], [18], [22], [25], [27], [30], [32], [34], [42], [48], [55], [58], [60], [66], [67], [68], [70], [71], [72] [2018-10-23 16:13:51,342 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 16:13:51,343 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 16:13:51,442 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 16:13:51,443 INFO L272 AbstractInterpreter]: Visited 23 different actions 92 times. Merged at 8 different actions 48 times. Widened at 1 different actions 6 times. Found 11 fixpoints after 3 different actions. Largest state had 8 variables. [2018-10-23 16:13:51,469 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:51,469 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 16:13:51,519 INFO L232 lantSequenceWeakener]: Weakened 26 states. On average, predicates are now at 58.01% of their original sizes. [2018-10-23 16:13:51,519 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 16:13:51,881 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 16:13:51,881 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 16:13:51,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [12] imperfect sequences [5] total 15 [2018-10-23 16:13:51,882 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 16:13:51,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 16:13:51,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 16:13:51,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-10-23 16:13:51,884 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 12 states. [2018-10-23 16:13:52,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 16:13:52,890 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2018-10-23 16:13:52,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 16:13:52,891 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-10-23 16:13:52,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 16:13:52,892 INFO L225 Difference]: With dead ends: 69 [2018-10-23 16:13:52,892 INFO L226 Difference]: Without dead ends: 67 [2018-10-23 16:13:52,893 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2018-10-23 16:13:52,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-23 16:13:52,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 53. [2018-10-23 16:13:52,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-23 16:13:52,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2018-10-23 16:13:52,905 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 28 [2018-10-23 16:13:52,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 16:13:52,905 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2018-10-23 16:13:52,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 16:13:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2018-10-23 16:13:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-23 16:13:52,906 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 16:13:52,907 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 16:13:52,907 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 16:13:52,907 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:52,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1416852077, now seen corresponding path program 1 times [2018-10-23 16:13:52,908 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 16:13:52,908 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:52,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 16:13:52,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:52,909 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 16:13:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 16:13:53,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 16:13:53,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 16:13:53,008 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 16:13:53,009 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2018-10-23 16:13:53,009 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [3], [8], [12], [18], [22], [25], [27], [30], [32], [34], [42], [46], [55], [58], [60], [66], [67], [68], [70], [71], [72] [2018-10-23 16:13:53,011 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 16:13:53,011 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 16:13:53,089 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-23 16:13:53,090 INFO L272 AbstractInterpreter]: Visited 24 different actions 90 times. Merged at 7 different actions 47 times. Widened at 1 different actions 6 times. Found 12 fixpoints after 4 different actions. Largest state had 8 variables. [2018-10-23 16:13:53,127 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:53,129 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-23 16:13:53,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 16:13:53,129 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 16:13:53,147 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 16:13:53,148 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 16:13:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 16:13:53,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 16:13:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 16:13:53,231 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 16:13:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 16:13:53,752 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 16:13:53,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2018-10-23 16:13:53,753 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 16:13:53,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 16:13:53,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 16:13:53,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-23 16:13:53,754 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 5 states. [2018-10-23 16:13:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 16:13:53,996 INFO L93 Difference]: Finished difference Result 112 states and 143 transitions. [2018-10-23 16:13:53,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 16:13:53,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2018-10-23 16:13:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 16:13:53,998 INFO L225 Difference]: With dead ends: 112 [2018-10-23 16:13:53,998 INFO L226 Difference]: Without dead ends: 86 [2018-10-23 16:13:53,999 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2018-10-23 16:13:53,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-10-23 16:13:54,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2018-10-23 16:13:54,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-23 16:13:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2018-10-23 16:13:54,014 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 28 [2018-10-23 16:13:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 16:13:54,014 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2018-10-23 16:13:54,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 16:13:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2018-10-23 16:13:54,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-23 16:13:54,015 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 16:13:54,016 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 16:13:54,016 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 16:13:54,016 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:54,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1098052710, now seen corresponding path program 2 times [2018-10-23 16:13:54,016 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 16:13:54,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:54,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 16:13:54,018 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:54,018 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 16:13:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 16:13:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 16:13:54,118 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 16:13:54,119 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 16:13:54,119 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 16:13:54,119 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 16:13:54,119 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 16:13:54,119 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 16:13:54,135 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 16:13:54,135 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-23 16:13:54,164 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-10-23 16:13:54,164 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 16:13:54,167 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 16:13:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-23 16:13:54,205 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 16:13:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-23 16:13:54,336 INFO L312 seRefinementStrategy]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2018-10-23 16:13:54,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [6] total 10 [2018-10-23 16:13:54,336 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 16:13:54,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 16:13:54,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 16:13:54,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-10-23 16:13:54,337 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand 5 states. [2018-10-23 16:13:54,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 16:13:54,530 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2018-10-23 16:13:54,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 16:13:54,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2018-10-23 16:13:54,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 16:13:54,533 INFO L225 Difference]: With dead ends: 131 [2018-10-23 16:13:54,533 INFO L226 Difference]: Without dead ends: 106 [2018-10-23 16:13:54,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-10-23 16:13:54,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2018-10-23 16:13:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2018-10-23 16:13:54,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-10-23 16:13:54,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2018-10-23 16:13:54,551 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 32 [2018-10-23 16:13:54,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 16:13:54,552 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2018-10-23 16:13:54,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 16:13:54,552 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2018-10-23 16:13:54,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-23 16:13:54,554 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 16:13:54,554 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 16:13:54,554 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 16:13:54,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:54,555 INFO L82 PathProgramCache]: Analyzing trace with hash 844843622, now seen corresponding path program 1 times [2018-10-23 16:13:54,555 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 16:13:54,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:54,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 16:13:54,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:54,556 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 16:13:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 16:13:54,643 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 55 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-10-23 16:13:54,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 16:13:54,643 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 16:13:54,644 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-10-23 16:13:54,644 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [3], [8], [12], [18], [22], [25], [27], [32], [34], [40], [42], [48], [55], [58], [60], [63], [65], [66], [67], [68], [70], [71], [72], [73] [2018-10-23 16:13:54,646 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 16:13:54,646 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 16:13:54,932 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 16:13:54,932 INFO L272 AbstractInterpreter]: Visited 26 different actions 413 times. Merged at 10 different actions 229 times. Widened at 3 different actions 44 times. Found 24 fixpoints after 5 different actions. Largest state had 8 variables. [2018-10-23 16:13:54,971 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:54,971 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 16:13:55,051 INFO L232 lantSequenceWeakener]: Weakened 53 states. On average, predicates are now at 39.47% of their original sizes. [2018-10-23 16:13:55,051 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 16:13:55,488 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 16:13:55,489 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 16:13:55,489 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [4] total 16 [2018-10-23 16:13:55,489 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 16:13:55,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-23 16:13:55,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-23 16:13:55,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2018-10-23 16:13:55,490 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand 14 states. [2018-10-23 16:13:56,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 16:13:56,787 INFO L93 Difference]: Finished difference Result 192 states and 237 transitions. [2018-10-23 16:13:56,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 16:13:56,788 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2018-10-23 16:13:56,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 16:13:56,790 INFO L225 Difference]: With dead ends: 192 [2018-10-23 16:13:56,790 INFO L226 Difference]: Without dead ends: 144 [2018-10-23 16:13:56,791 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2018-10-23 16:13:56,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2018-10-23 16:13:56,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2018-10-23 16:13:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-23 16:13:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2018-10-23 16:13:56,816 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 55 [2018-10-23 16:13:56,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 16:13:56,817 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2018-10-23 16:13:56,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-23 16:13:56,817 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2018-10-23 16:13:56,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-23 16:13:56,820 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 16:13:56,820 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 6, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 16:13:56,820 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 16:13:56,821 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1237870632, now seen corresponding path program 1 times [2018-10-23 16:13:56,821 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 16:13:56,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:56,822 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 16:13:56,822 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 16:13:56,822 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 16:13:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 16:13:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 54 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-10-23 16:13:56,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 16:13:56,932 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 16:13:56,932 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 56 with the following transitions: [2018-10-23 16:13:56,933 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [3], [8], [12], [18], [22], [25], [27], [30], [32], [34], [40], [42], [48], [55], [58], [60], [63], [65], [66], [67], [68], [70], [71], [72], [73] [2018-10-23 16:13:56,935 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 16:13:56,935 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 16:13:57,484 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2018-10-23 16:13:57,487 INFO L272 AbstractInterpreter]: Visited 27 different actions 554 times. Merged at 12 different actions 271 times. Widened at 3 different actions 39 times. Found 72 fixpoints after 8 different actions. Largest state had 8 variables. [2018-10-23 16:13:57,516 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 16:13:57,516 INFO L398 sIntCurrentIteration]: Generating AbsInt predicates [2018-10-23 16:13:57,599 INFO L232 lantSequenceWeakener]: Weakened 53 states. On average, predicates are now at 42.92% of their original sizes. [2018-10-23 16:13:57,599 INFO L411 sIntCurrentIteration]: Unifying AI predicates [2018-10-23 16:13:58,340 INFO L422 sIntCurrentIteration]: Finished generation of AbsInt predicates [2018-10-23 16:13:58,341 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 16:13:58,341 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [17] imperfect sequences [6] total 21 [2018-10-23 16:13:58,341 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 16:13:58,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-23 16:13:58,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-23 16:13:58,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2018-10-23 16:13:58,343 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand 17 states. [2018-10-23 16:13:59,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 16:13:59,484 INFO L93 Difference]: Finished difference Result 119 states and 143 transitions. [2018-10-23 16:13:59,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 16:13:59,484 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 55 [2018-10-23 16:13:59,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 16:13:59,485 INFO L225 Difference]: With dead ends: 119 [2018-10-23 16:13:59,485 INFO L226 Difference]: Without dead ends: 0 [2018-10-23 16:13:59,487 INFO L605 BasicCegarLoop]: 2 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2018-10-23 16:13:59,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-23 16:13:59,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-23 16:13:59,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-23 16:13:59,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-23 16:13:59,488 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2018-10-23 16:13:59,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 16:13:59,488 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-23 16:13:59,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-23 16:13:59,488 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-23 16:13:59,488 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-23 16:13:59,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-23 16:13:59,754 WARN L179 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 119 [2018-10-23 16:13:59,961 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 109 [2018-10-23 16:14:00,116 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-10-23 16:14:00,460 WARN L179 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2018-10-23 16:14:01,934 WARN L179 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 126 DAG size of output: 44 [2018-10-23 16:14:02,571 WARN L179 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 57 [2018-10-23 16:14:02,950 WARN L179 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 45 [2018-10-23 16:14:02,956 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2018-10-23 16:14:02,957 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2018-10-23 16:14:02,957 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2018-10-23 16:14:02,957 INFO L425 ceAbstractionStarter]: For program point nondetFINAL(lines 15 19) no Hoare annotation was computed. [2018-10-23 16:14:02,957 INFO L428 ceAbstractionStarter]: At program point nondetENTRY(lines 15 19) the Hoare annotation is: true [2018-10-23 16:14:02,957 INFO L425 ceAbstractionStarter]: For program point nondetEXIT(lines 15 19) no Hoare annotation was computed. [2018-10-23 16:14:02,958 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-23 16:14:02,958 INFO L421 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (and (<= 0 (+ (* 2 ~last~0) 4294967296)) (<= ~last~0 199999)) [2018-10-23 16:14:02,958 INFO L428 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2018-10-23 16:14:02,958 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-23 16:14:02,959 INFO L421 ceAbstractionStarter]: At program point L33(lines 24 34) the Hoare annotation is: (let ((.cse0 (* 2 main_~c~0)) (.cse1 (+ main_~st~0 199999))) (let ((.cse2 (<= main_~a~0 main_~b~0)) (.cse3 (<= main_~b~0 main_~a~0)) (.cse4 (<= .cse1 main_~c~0)) (.cse5 (<= .cse0 400000)) (.cse6 (<= 0 (+ ~last~0 main_~st~0 2147483647))) (.cse7 (<= 2 (+ main_~a~0 main_~st~0)))) (or (< (+ (* 2 |old(~last~0)|) 4294967296) 0) (and (<= 400000 .cse0) (<= main_~c~0 .cse1) .cse2 .cse3 .cse4 (= (mod main_~a~0 2) 0) .cse5 .cse6 (<= (+ ~last~0 main_~c~0) 2147683647) .cse7) (and (and (= main_~b~0 0) (<= (+ main_~a~0 main_~b~0) 0) (<= main_~c~0 main_~a~0)) (<= (+ ~last~0 main_~b~0) 2147483647) (<= main_~b~0 main_~c~0) (<= 0 (+ ~last~0 main_~a~0 2147483648))) (and (<= 200000 (+ main_~st~0 main_~c~0)) (<= ~last~0 199999) .cse2 .cse3 .cse4 .cse5 (<= (+ main_~st~0 1) main_~a~0) .cse6 .cse7) (< 199999 |old(~last~0)|)))) [2018-10-23 16:14:02,959 INFO L421 ceAbstractionStarter]: At program point L31-1(lines 31 32) the Hoare annotation is: (let ((.cse0 (* 2 main_~c~0)) (.cse1 (+ main_~st~0 199999))) (let ((.cse2 (<= main_~a~0 main_~b~0)) (.cse3 (<= main_~b~0 main_~a~0)) (.cse4 (<= .cse1 main_~c~0)) (.cse5 (<= .cse0 400000)) (.cse6 (<= 0 (+ ~last~0 main_~st~0 2147483647))) (.cse7 (<= 2 (+ main_~a~0 main_~st~0)))) (or (and (<= 400000 .cse0) (<= main_~c~0 .cse1) .cse2 .cse3 .cse4 (= (mod main_~a~0 2) 0) .cse5 .cse6 (<= (+ ~last~0 main_~c~0) 2147683647) .cse7) (< (+ (* 2 |old(~last~0)|) 4294967296) 0) (and (<= 200000 (+ main_~st~0 main_~c~0)) (<= ~last~0 199999) .cse2 .cse3 .cse4 .cse5 (<= (+ main_~st~0 1) main_~a~0) .cse6 .cse7) (< 199999 |old(~last~0)|)))) [2018-10-23 16:14:02,959 INFO L425 ceAbstractionStarter]: For program point L27(line 27) no Hoare annotation was computed. [2018-10-23 16:14:02,959 INFO L425 ceAbstractionStarter]: For program point mainEXIT(lines 21 35) no Hoare annotation was computed. [2018-10-23 16:14:02,959 INFO L421 ceAbstractionStarter]: At program point mainENTRY(lines 21 35) the Hoare annotation is: (or (< (+ (* 2 |old(~last~0)|) 4294967296) 0) (and (<= 0 (+ (* 2 ~last~0) 4294967296)) (<= ~last~0 199999)) (< 199999 |old(~last~0)|)) [2018-10-23 16:14:02,959 INFO L425 ceAbstractionStarter]: For program point L28-1(lines 24 34) no Hoare annotation was computed. [2018-10-23 16:14:02,960 INFO L425 ceAbstractionStarter]: For program point L26-1(lines 26 27) no Hoare annotation was computed. [2018-10-23 16:14:02,960 INFO L425 ceAbstractionStarter]: For program point L24-1(lines 24 34) no Hoare annotation was computed. [2018-10-23 16:14:02,960 INFO L425 ceAbstractionStarter]: For program point L26-3(lines 26 27) no Hoare annotation was computed. [2018-10-23 16:14:02,960 INFO L425 ceAbstractionStarter]: For program point L22(line 22) no Hoare annotation was computed. [2018-10-23 16:14:02,960 INFO L421 ceAbstractionStarter]: At program point L26-4(lines 26 27) the Hoare annotation is: (let ((.cse1 (* 2 main_~st~0))) (let ((.cse0 (<= .cse1 2)) (.cse2 (<= 1 (+ main_~st~0 main_~c~0))) (.cse3 (<= main_~a~0 main_~b~0)) (.cse4 (<= main_~b~0 main_~a~0)) (.cse5 (<= (* 2 main_~c~0) 400000)) (.cse6 (<= 0 (+ ~last~0 main_~st~0 2147483647))) (.cse7 (<= 0 (+ main_~a~0 main_~st~0)))) (or (and .cse0 (<= 2 .cse1) .cse2 .cse3 (<= (* 2 ~last~0) 4294967294) .cse4 (= (mod main_~a~0 2) 0) .cse5 .cse6 .cse7) (< (+ (* 2 |old(~last~0)|) 4294967296) 0) (and .cse0 (<= 0 .cse1) (<= ~last~0 199999) .cse2 .cse3 .cse4 .cse5 .cse6 (<= main_~st~0 (+ main_~b~0 1)) .cse7) (< 199999 |old(~last~0)|)))) [2018-10-23 16:14:02,960 INFO L425 ceAbstractionStarter]: For program point L26-5(lines 24 34) no Hoare annotation was computed. [2018-10-23 16:14:02,960 INFO L425 ceAbstractionStarter]: For program point L24-3(lines 21 35) no Hoare annotation was computed. [2018-10-23 16:14:02,961 INFO L428 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 8 13) the Hoare annotation is: true [2018-10-23 16:14:02,961 INFO L425 ceAbstractionStarter]: For program point L10(line 10) no Hoare annotation was computed. [2018-10-23 16:14:02,961 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2018-10-23 16:14:02,961 INFO L425 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 8 13) no Hoare annotation was computed. [2018-10-23 16:14:02,961 INFO L425 ceAbstractionStarter]: For program point L9(lines 9 11) no Hoare annotation was computed. [2018-10-23 16:14:02,961 INFO L425 ceAbstractionStarter]: For program point L9-2(lines 8 13) no Hoare annotation was computed. [2018-10-23 16:14:02,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 04:14:02 BoogieIcfgContainer [2018-10-23 16:14:02,977 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 16:14:02,978 INFO L168 Benchmark]: Toolchain (without parser) took 19723.11 ms. Allocated memory was 1.5 GB in the beginning and 2.6 GB in the end (delta: 1.1 GB). Free memory was 1.4 GB in the beginning and 2.0 GB in the end (delta: -613.3 MB). Peak memory consumption was 454.7 MB. Max. memory is 7.1 GB. [2018-10-23 16:14:02,980 INFO L168 Benchmark]: CDTParser took 0.16 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. [2018-10-23 16:14:02,980 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.18 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. [2018-10-23 16:14:02,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.34 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. [2018-10-23 16:14:02,981 INFO L168 Benchmark]: Boogie Preprocessor took 22.21 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. [2018-10-23 16:14:02,982 INFO L168 Benchmark]: RCFGBuilder took 506.98 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 738.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -794.1 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-10-23 16:14:02,983 INFO L168 Benchmark]: TraceAbstraction took 18825.25 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 329.8 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 170.3 MB). Peak memory consumption was 500.0 MB. Max. memory is 7.1 GB. [2018-10-23 16:14:02,988 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 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 340.18 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 20.34 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 22.21 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 506.98 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 738.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -794.1 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18825.25 ms. Allocated memory was 2.3 GB in the beginning and 2.6 GB in the end (delta: 329.8 MB). Free memory was 2.2 GB in the beginning and 2.0 GB in the end (delta: 170.3 MB). Peak memory consumption was 500.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 10]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (((((((((((2 * st <= 2 && 2 <= 2 * st) && 1 <= st + c) && a <= b) && 2 * last <= 4294967294) && b <= a) && a % 2 == 0) && 2 * c <= 400000) && 0 <= last + st + 2147483647) && 0 <= a + st) || 2 * \old(last) + 4294967296 < 0) || (((((((((2 * st <= 2 && 0 <= 2 * st) && last <= 199999) && 1 <= st + c) && a <= b) && b <= a) && 2 * c <= 400000) && 0 <= last + st + 2147483647) && st <= b + 1) && 0 <= a + st)) || 199999 < \old(last) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((2 * \old(last) + 4294967296 < 0 || (((((((((400000 <= 2 * c && c <= st + 199999) && a <= b) && b <= a) && st + 199999 <= c) && a % 2 == 0) && 2 * c <= 400000) && 0 <= last + st + 2147483647) && last + c <= 2147683647) && 2 <= a + st)) || (((((b == 0 && a + b <= 0) && c <= a) && last + b <= 2147483647) && b <= c) && 0 <= last + a + 2147483648)) || ((((((((200000 <= st + c && last <= 199999) && a <= b) && b <= a) && st + 199999 <= c) && 2 * c <= 400000) && st + 1 <= a) && 0 <= last + st + 2147483647) && 2 <= a + st)) || 199999 < \old(last) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. SAFE Result, 18.7s OverallTime, 11 OverallIterations, 8 TraceHistogramMax, 7.0s AutomataDifference, 0.0s DeadEndRemovalTime, 3.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 264 SDtfs, 266 SDslu, 645 SDs, 0 SdLazy, 308 SolverSat, 93 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 14 DeclaredPredicates, 374 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.8s AbstIntTime, 8 AbstIntIterations, 7 AbstIntStrong, 0.9096320346320347 AbsIntWeakeningRatio, 0.5281385281385281 AbsIntAvgWeakeningVarsNumRemoved, 19.874458874458874 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 92 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 24 PreInvPairs, 51 NumberOfFragments, 377 HoareAnnotationTreeSize, 24 FomulaSimplifications, 14130 FormulaSimplificationTreeSizeReduction, 0.4s HoareSimplificationTime, 9 FomulaSimplificationsInter, 2066 FormulaSimplificationTreeSizeReductionInter, 2.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 397 NumberOfCodeBlocks, 389 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 442 ConstructedInterpolants, 0 QuantifiedInterpolants, 24902 SizeOfPredicates, 6 NumberOfNonLiveVariables, 147 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 194/286 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...