java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 02:56:00,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 02:56:00,559 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 02:56:00,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-10 02:56:00,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-10 02:56:00,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-10 02:56:00,575 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-10 02:56:00,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-10 02:56:00,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-10 02:56:00,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-10 02:56:00,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-10 02:56:00,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-10 02:56:00,581 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 02:56:00,582 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 02:56:00,583 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 02:56:00,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 02:56:00,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 02:56:00,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 02:56:00,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 02:56:00,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 02:56:00,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 02:56:00,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 02:56:00,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 02:56:00,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 02:56:00,596 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-10 02:56:00,596 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-10 02:56:00,596 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-10 02:56:00,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-10 02:56:00,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-10 02:56:00,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-10 02:56:00,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-10 02:56:00,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-10 02:56:00,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-10 02:56:00,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-10 02:56:00,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-10 02:56:00,603 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-10 02:56:00,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-10 02:56:00,604 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-10 02:56:00,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 02:56:00,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 02:56:00,607 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 02:56:00,608 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-10 02:56:00,630 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 02:56:00,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 02:56:00,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 02:56:00,631 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 02:56:00,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 02:56:00,632 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 02:56:00,633 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 02:56:00,633 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 02:56:00,633 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 02:56:00,633 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 02:56:00,635 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 02:56:00,636 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 02:56:00,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 02:56:00,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 02:56:00,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 02:56:00,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 02:56:00,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 02:56:00,637 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 02:56:00,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 02:56:00,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 02:56:00,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 02:56:00,638 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 02:56:00,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 02:56:00,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:56:00,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 02:56:00,639 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 02:56:00,639 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 02:56:00,640 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 02:56:00,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 02:56:00,640 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 02:56:00,693 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 02:56:00,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 02:56:00,721 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 02:56:00,722 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 02:56:00,723 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 02:56:00,724 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_15-2.c [2019-09-10 02:56:00,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/374671c83/ef0c2a543baf467f8fd382c3b9b7da01/FLAGcf3a74eb7 [2019-09-10 02:56:01,273 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 02:56:01,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_15-2.c [2019-09-10 02:56:01,281 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/374671c83/ef0c2a543baf467f8fd382c3b9b7da01/FLAGcf3a74eb7 [2019-09-10 02:56:01,623 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/374671c83/ef0c2a543baf467f8fd382c3b9b7da01 [2019-09-10 02:56:01,637 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 02:56:01,638 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 02:56:01,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 02:56:01,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 02:56:01,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 02:56:01,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:56:01" (1/1) ... [2019-09-10 02:56:01,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9883472 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:56:01, skipping insertion in model container [2019-09-10 02:56:01,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:56:01" (1/1) ... [2019-09-10 02:56:01,654 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 02:56:01,671 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 02:56:01,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:56:01,851 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 02:56:01,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:56:01,885 INFO L192 MainTranslator]: Completed translation [2019-09-10 02:56:01,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:56:01 WrapperNode [2019-09-10 02:56:01,886 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 02:56:01,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 02:56:01,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 02:56:01,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 02:56:01,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:56:01" (1/1) ... [2019-09-10 02:56:01,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:56:01" (1/1) ... [2019-09-10 02:56:01,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:56:01" (1/1) ... [2019-09-10 02:56:01,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:56:01" (1/1) ... [2019-09-10 02:56:01,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:56:01" (1/1) ... [2019-09-10 02:56:02,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:56:01" (1/1) ... [2019-09-10 02:56:02,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:56:01" (1/1) ... [2019-09-10 02:56:02,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 02:56:02,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 02:56:02,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 02:56:02,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 02:56:02,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:56:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:56:02,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 02:56:02,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 02:56:02,055 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-09-10 02:56:02,055 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 02:56:02,055 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 02:56:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 02:56:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-09-10 02:56:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 02:56:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 02:56:02,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 02:56:02,209 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 02:56:02,210 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 02:56:02,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:56:02 BoogieIcfgContainer [2019-09-10 02:56:02,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 02:56:02,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 02:56:02,212 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 02:56:02,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 02:56:02,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 02:56:01" (1/3) ... [2019-09-10 02:56:02,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56fe9cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:56:02, skipping insertion in model container [2019-09-10 02:56:02,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:56:01" (2/3) ... [2019-09-10 02:56:02,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56fe9cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:56:02, skipping insertion in model container [2019-09-10 02:56:02,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:56:02" (3/3) ... [2019-09-10 02:56:02,219 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_15-2.c [2019-09-10 02:56:02,229 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 02:56:02,237 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 02:56:02,250 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 02:56:02,274 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 02:56:02,274 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 02:56:02,274 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 02:56:02,275 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 02:56:02,275 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 02:56:02,275 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 02:56:02,275 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 02:56:02,275 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 02:56:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-09-10 02:56:02,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-10 02:56:02,301 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:56:02,302 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:56:02,304 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:56:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:56:02,310 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2019-09-10 02:56:02,312 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:56:02,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:56:02,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:56:02,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:56:02,356 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:56:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:56:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:56:02,501 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:56:02,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 02:56:02,502 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:56:02,509 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 02:56:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 02:56:02,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 02:56:02,537 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2019-09-10 02:56:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:56:02,670 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-09-10 02:56:02,671 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 02:56:02,673 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-10 02:56:02,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:56:02,682 INFO L225 Difference]: With dead ends: 26 [2019-09-10 02:56:02,682 INFO L226 Difference]: Without dead ends: 21 [2019-09-10 02:56:02,684 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-10 02:56:02,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-10 02:56:02,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-10 02:56:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-10 02:56:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-10 02:56:02,720 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2019-09-10 02:56:02,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:56:02,721 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-10 02:56:02,721 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 02:56:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-10 02:56:02,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-10 02:56:02,723 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:56:02,723 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:56:02,723 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:56:02,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:56:02,724 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2019-09-10 02:56:02,724 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:56:02,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:56:02,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:56:02,726 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:56:02,726 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:56:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:56:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 02:56:02,776 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:56:02,776 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 02:56:02,779 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:56:02,781 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 02:56:02,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 02:56:02,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 02:56:02,782 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-09-10 02:56:02,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:56:02,801 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2019-09-10 02:56:02,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 02:56:02,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-10 02:56:02,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:56:02,803 INFO L225 Difference]: With dead ends: 25 [2019-09-10 02:56:02,803 INFO L226 Difference]: Without dead ends: 23 [2019-09-10 02:56:02,804 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 02:56:02,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-10 02:56:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-09-10 02:56:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-10 02:56:02,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-10 02:56:02,812 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2019-09-10 02:56:02,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:56:02,813 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-10 02:56:02,813 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 02:56:02,813 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-10 02:56:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-10 02:56:02,814 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:56:02,814 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:56:02,815 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:56:02,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:56:02,815 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2019-09-10 02:56:02,816 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:56:02,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:56:02,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:56:02,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:56:02,817 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:56:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:56:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 02:56:02,923 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:56:02,923 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:56:02,924 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2019-09-10 02:56:02,926 INFO L207 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [33], [34], [36], [37], [38], [39], [40], [41] [2019-09-10 02:56:02,963 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:56:02,963 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:56:03,412 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-10 02:56:03,415 INFO L272 AbstractInterpreter]: Visited 17 different actions 1134 times. Merged at 2 different actions 18 times. Widened at 2 different actions 122 times. Performed 1139 root evaluator evaluations with a maximum evaluation depth of 3. Performed 1139 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 73 fixpoints after 3 different actions. Largest state had 5 variables. [2019-09-10 02:56:03,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:56:03,420 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-10 02:56:03,457 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 50% of their original sizes. [2019-09-10 02:56:03,458 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-10 02:56:03,510 INFO L420 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2019-09-10 02:56:03,510 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-10 02:56:03,511 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-10 02:56:03,512 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2019-09-10 02:56:03,512 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:56:03,513 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-10 02:56:03,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-10 02:56:03,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-10 02:56:03,514 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2019-09-10 02:56:03,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:56:03,762 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2019-09-10 02:56:03,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-10 02:56:03,762 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-09-10 02:56:03,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:56:03,764 INFO L225 Difference]: With dead ends: 39 [2019-09-10 02:56:03,764 INFO L226 Difference]: Without dead ends: 39 [2019-09-10 02:56:03,765 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-10 02:56:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-10 02:56:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-10 02:56:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-10 02:56:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2019-09-10 02:56:03,773 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2019-09-10 02:56:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:56:03,774 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2019-09-10 02:56:03,774 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-10 02:56:03,774 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2019-09-10 02:56:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-10 02:56:03,776 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:56:03,776 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:56:03,777 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:56:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:56:03,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2019-09-10 02:56:03,777 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:56:03,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:56:03,778 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:56:03,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:56:03,779 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:56:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:56:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-09-10 02:56:03,867 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:56:03,868 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:56:03,868 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:56:03,870 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:56:03,870 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:56:03,870 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-10 02:56:03,888 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 02:56:03,889 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 02:56:03,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-10 02:56:03,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:56:03,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-10 02:56:03,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:56:04,021 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-10 02:56:04,022 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:56:04,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 02:56:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-09-10 02:56:04,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 02:56:04,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 11 [2019-09-10 02:56:04,284 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 02:56:04,287 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-10 02:56:04,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-10 02:56:04,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-09-10 02:56:04,289 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 8 states. [2019-09-10 02:56:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:56:04,454 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2019-09-10 02:56:04,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-10 02:56:04,455 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 39 [2019-09-10 02:56:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:56:04,457 INFO L225 Difference]: With dead ends: 50 [2019-09-10 02:56:04,458 INFO L226 Difference]: Without dead ends: 47 [2019-09-10 02:56:04,461 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-09-10 02:56:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-09-10 02:56:04,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2019-09-10 02:56:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-10 02:56:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-09-10 02:56:04,481 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 39 [2019-09-10 02:56:04,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:56:04,483 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-09-10 02:56:04,483 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-10 02:56:04,483 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-09-10 02:56:04,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-09-10 02:56:04,489 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:56:04,489 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:56:04,489 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:56:04,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:56:04,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 1 times [2019-09-10 02:56:04,490 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:56:04,491 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:56:04,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:56:04,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:56:04,492 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:56:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:56:04,617 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-10 02:56:04,617 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:56:04,618 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:56:04,618 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 42 with the following transitions: [2019-09-10 02:56:04,618 INFO L207 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [33], [34], [36], [37], [38], [39], [40], [41] [2019-09-10 02:56:04,623 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:56:04,624 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)