java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/Mono1_false-unreach-call1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.23-df4b876 [2018-11-06 22:56:33,604 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-06 22:56:33,606 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-06 22:56:33,617 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-06 22:56:33,618 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-06 22:56:33,619 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-06 22:56:33,620 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-06 22:56:33,622 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-06 22:56:33,623 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-06 22:56:33,625 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-06 22:56:33,627 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-06 22:56:33,627 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-06 22:56:33,628 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-06 22:56:33,629 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-06 22:56:33,632 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-06 22:56:33,632 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-06 22:56:33,643 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-06 22:56:33,645 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-06 22:56:33,649 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-06 22:56:33,650 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-06 22:56:33,653 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-06 22:56:33,657 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-06 22:56:33,663 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-11-06 22:56:33,676 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-11-06 22:56:33,701 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-06 22:56:33,701 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-06 22:56:33,702 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-06 22:56:33,702 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-11-06 22:56:33,704 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-06 22:56:33,704 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-06 22:56:33,704 INFO L133 SettingsManager]: * Use SBE=true [2018-11-06 22:56:33,705 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-06 22:56:33,706 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-06 22:56:33,706 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-06 22:56:33,706 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-06 22:56:33,706 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-06 22:56:33,706 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-06 22:56:33,707 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-06 22:56:33,707 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-06 22:56:33,707 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-06 22:56:33,707 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-06 22:56:33,707 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-06 22:56:33,708 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-06 22:56:33,709 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:56:33,709 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-06 22:56:33,709 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-06 22:56:33,709 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-06 22:56:33,710 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-06 22:56:33,710 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-06 22:56:33,710 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-06 22:56:33,710 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-06 22:56:33,710 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-11-06 22:56:33,760 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-06 22:56:33,775 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-06 22:56:33,779 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-06 22:56:33,781 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-06 22:56:33,781 INFO L276 PluginConnector]: CDTParser initialized [2018-11-06 22:56:33,782 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_false-unreach-call1.c [2018-11-06 22:56:33,850 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e20c38fc/cfcb4e04c27e4a24bb269c5bbcdf93cc/FLAG685c62806 [2018-11-06 22:56:34,340 INFO L298 CDTParser]: Found 1 translation units. [2018-11-06 22:56:34,341 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_false-unreach-call1.c [2018-11-06 22:56:34,348 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e20c38fc/cfcb4e04c27e4a24bb269c5bbcdf93cc/FLAG685c62806 [2018-11-06 22:56:34,362 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e20c38fc/cfcb4e04c27e4a24bb269c5bbcdf93cc [2018-11-06 22:56:34,371 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-06 22:56:34,372 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-11-06 22:56:34,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-06 22:56:34,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-06 22:56:34,377 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-06 22:56:34,378 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:34" (1/1) ... [2018-11-06 22:56:34,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a018d90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:34, skipping insertion in model container [2018-11-06 22:56:34,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:34" (1/1) ... [2018-11-06 22:56:34,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-06 22:56:34,414 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-06 22:56:34,590 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:56:34,594 INFO L189 MainTranslator]: Completed pre-run [2018-11-06 22:56:34,610 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-06 22:56:34,626 INFO L193 MainTranslator]: Completed translation [2018-11-06 22:56:34,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:34 WrapperNode [2018-11-06 22:56:34,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-06 22:56:34,628 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-06 22:56:34,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-06 22:56:34,628 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-06 22:56:34,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:34" (1/1) ... [2018-11-06 22:56:34,643 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:34" (1/1) ... [2018-11-06 22:56:34,662 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-06 22:56:34,663 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-06 22:56:34,663 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-06 22:56:34,663 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-06 22:56:34,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:34" (1/1) ... [2018-11-06 22:56:34,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:34" (1/1) ... [2018-11-06 22:56:34,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:34" (1/1) ... [2018-11-06 22:56:34,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:34" (1/1) ... [2018-11-06 22:56:34,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:34" (1/1) ... [2018-11-06 22:56:34,680 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:34" (1/1) ... [2018-11-06 22:56:34,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:34" (1/1) ... [2018-11-06 22:56:34,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-06 22:56:34,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-06 22:56:34,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-06 22:56:34,683 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-06 22:56:34,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-06 22:56:34,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-06 22:56:34,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-06 22:56:34,988 INFO L276 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-06 22:56:34,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:34 BoogieIcfgContainer [2018-11-06 22:56:34,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-06 22:56:34,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-06 22:56:34,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-06 22:56:34,993 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-06 22:56:34,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:56:34" (1/3) ... [2018-11-06 22:56:34,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d9fb1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:34, skipping insertion in model container [2018-11-06 22:56:34,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:34" (2/3) ... [2018-11-06 22:56:34,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d9fb1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:34, skipping insertion in model container [2018-11-06 22:56:34,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:34" (3/3) ... [2018-11-06 22:56:34,996 INFO L112 eAbstractionObserver]: Analyzing ICFG Mono1_false-unreach-call1.c [2018-11-06 22:56:35,004 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-06 22:56:35,011 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-06 22:56:35,025 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-06 22:56:35,056 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-06 22:56:35,057 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-06 22:56:35,057 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-06 22:56:35,057 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-06 22:56:35,057 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-06 22:56:35,058 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-06 22:56:35,058 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-06 22:56:35,058 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-06 22:56:35,058 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-06 22:56:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2018-11-06 22:56:35,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-11-06 22:56:35,078 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:35,079 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-11-06 22:56:35,081 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:35,087 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:35,088 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2018-11-06 22:56:35,090 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:35,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:35,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:35,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:35,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:35,197 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:56:35,197 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-11-06 22:56:35,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-11-06 22:56:35,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-11-06 22:56:35,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:56:35,216 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2018-11-06 22:56:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:35,234 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-11-06 22:56:35,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-06 22:56:35,235 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2018-11-06 22:56:35,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:35,246 INFO L225 Difference]: With dead ends: 21 [2018-11-06 22:56:35,246 INFO L226 Difference]: Without dead ends: 9 [2018-11-06 22:56:35,249 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-11-06 22:56:35,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-11-06 22:56:35,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-11-06 22:56:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-06 22:56:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-11-06 22:56:35,285 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-11-06 22:56:35,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:35,286 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-11-06 22:56:35,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-11-06 22:56:35,286 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-11-06 22:56:35,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-11-06 22:56:35,287 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:35,287 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:35,287 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:35,288 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:35,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1805929617, now seen corresponding path program 1 times [2018-11-06 22:56:35,288 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:35,288 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:35,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:35,290 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:35,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:35,463 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-06 22:56:35,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-11-06 22:56:35,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-11-06 22:56:35,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-11-06 22:56:35,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:56:35,472 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-11-06 22:56:35,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:35,698 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2018-11-06 22:56:35,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-11-06 22:56:35,699 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-11-06 22:56:35,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:35,699 INFO L225 Difference]: With dead ends: 19 [2018-11-06 22:56:35,699 INFO L226 Difference]: Without dead ends: 12 [2018-11-06 22:56:35,701 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-11-06 22:56:35,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-11-06 22:56:35,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-11-06 22:56:35,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-11-06 22:56:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2018-11-06 22:56:35,704 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2018-11-06 22:56:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:35,708 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2018-11-06 22:56:35,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-11-06 22:56:35,708 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2018-11-06 22:56:35,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-11-06 22:56:35,709 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:35,709 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:35,712 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:35,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:35,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1049525042, now seen corresponding path program 1 times [2018-11-06 22:56:35,713 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:35,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:35,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:35,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:35,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:35,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:35,837 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:56:35,837 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:56:35,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:35,876 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:35,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:35,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:56:35,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-11-06 22:56:35,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-11-06 22:56:35,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-11-06 22:56:35,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:56:35,947 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2018-11-06 22:56:36,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:36,062 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2018-11-06 22:56:36,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-11-06 22:56:36,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2018-11-06 22:56:36,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:36,064 INFO L225 Difference]: With dead ends: 22 [2018-11-06 22:56:36,064 INFO L226 Difference]: Without dead ends: 15 [2018-11-06 22:56:36,064 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-11-06 22:56:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-11-06 22:56:36,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-11-06 22:56:36,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-06 22:56:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-11-06 22:56:36,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2018-11-06 22:56:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:36,069 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2018-11-06 22:56:36,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-11-06 22:56:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2018-11-06 22:56:36,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-11-06 22:56:36,070 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:36,070 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:36,070 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:36,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:36,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1777006735, now seen corresponding path program 2 times [2018-11-06 22:56:36,071 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:36,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:36,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:36,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:36,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:36,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:36,201 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:36,204 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:56:36,204 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:56:36,223 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:56:36,253 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:56:36,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:36,255 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:36,338 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:56:36,338 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-11-06 22:56:36,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-06 22:56:36,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-06 22:56:36,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:56:36,339 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2018-11-06 22:56:36,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:36,586 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2018-11-06 22:56:36,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-06 22:56:36,587 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2018-11-06 22:56:36,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:36,588 INFO L225 Difference]: With dead ends: 25 [2018-11-06 22:56:36,588 INFO L226 Difference]: Without dead ends: 18 [2018-11-06 22:56:36,588 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-06 22:56:36,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-11-06 22:56:36,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-11-06 22:56:36,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-06 22:56:36,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2018-11-06 22:56:36,593 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2018-11-06 22:56:36,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:36,593 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2018-11-06 22:56:36,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-06 22:56:36,593 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2018-11-06 22:56:36,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-11-06 22:56:36,594 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:36,594 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:36,594 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:36,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:36,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1779147282, now seen corresponding path program 3 times [2018-11-06 22:56:36,595 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:36,595 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:36,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:36,596 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:36,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:36,732 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:56:36,732 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:56:36,750 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:56:36,759 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-11-06 22:56:36,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:36,761 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:36,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-11-06 22:56:36,806 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-06 22:56:36,806 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2018-11-06 22:56:36,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-11-06 22:56:36,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-11-06 22:56:36,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:56:36,808 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2018-11-06 22:56:36,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:36,947 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2018-11-06 22:56:36,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:56:36,948 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2018-11-06 22:56:36,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:36,949 INFO L225 Difference]: With dead ends: 31 [2018-11-06 22:56:36,949 INFO L226 Difference]: Without dead ends: 24 [2018-11-06 22:56:36,949 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-11-06 22:56:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-11-06 22:56:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2018-11-06 22:56:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-06 22:56:36,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-11-06 22:56:36,954 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2018-11-06 22:56:36,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:36,955 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2018-11-06 22:56:36,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-11-06 22:56:36,955 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2018-11-06 22:56:36,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-06 22:56:36,956 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:36,956 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:36,956 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:36,957 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:36,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1231130700, now seen corresponding path program 1 times [2018-11-06 22:56:36,957 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:36,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:36,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:36,958 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:36,958 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:37,217 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:56:37,217 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:56:37,233 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:37,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:37,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:56:37,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2018-11-06 22:56:37,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-11-06 22:56:37,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-06 22:56:37,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:56:37,318 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 8 states. [2018-11-06 22:56:37,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:37,842 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2018-11-06 22:56:37,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-06 22:56:37,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2018-11-06 22:56:37,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:37,843 INFO L225 Difference]: With dead ends: 35 [2018-11-06 22:56:37,843 INFO L226 Difference]: Without dead ends: 26 [2018-11-06 22:56:37,844 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-06 22:56:37,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-11-06 22:56:37,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-11-06 22:56:37,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-06 22:56:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2018-11-06 22:56:37,849 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2018-11-06 22:56:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:37,849 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2018-11-06 22:56:37,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-11-06 22:56:37,850 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2018-11-06 22:56:37,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-06 22:56:37,850 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:37,851 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:37,851 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:37,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:37,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1472252305, now seen corresponding path program 2 times [2018-11-06 22:56:37,852 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:37,852 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:37,853 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:37,853 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:56:37,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:38,161 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:56:38,162 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:56:38,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:56:38,184 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:56:38,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:38,187 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:38,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:56:38,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-06 22:56:38,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-11-06 22:56:38,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-11-06 22:56:38,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:56:38,231 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 9 states. [2018-11-06 22:56:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:38,372 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2018-11-06 22:56:38,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-11-06 22:56:38,372 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2018-11-06 22:56:38,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:38,373 INFO L225 Difference]: With dead ends: 38 [2018-11-06 22:56:38,373 INFO L226 Difference]: Without dead ends: 29 [2018-11-06 22:56:38,374 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-11-06 22:56:38,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-11-06 22:56:38,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-11-06 22:56:38,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-11-06 22:56:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-11-06 22:56:38,382 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2018-11-06 22:56:38,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:38,382 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2018-11-06 22:56:38,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-11-06 22:56:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2018-11-06 22:56:38,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-11-06 22:56:38,383 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:38,383 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:38,384 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:38,384 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:38,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1271380332, now seen corresponding path program 3 times [2018-11-06 22:56:38,384 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:38,384 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:38,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:38,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:38,385 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:38,708 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:38,709 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:56:38,709 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:56:38,720 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:56:38,739 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-11-06 22:56:38,740 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:38,742 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-11-06 22:56:38,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:56:38,860 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2018-11-06 22:56:38,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:56:38,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:56:38,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:56:38,863 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 12 states. [2018-11-06 22:56:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:39,179 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2018-11-06 22:56:39,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:56:39,181 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2018-11-06 22:56:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:39,182 INFO L225 Difference]: With dead ends: 45 [2018-11-06 22:56:39,182 INFO L226 Difference]: Without dead ends: 36 [2018-11-06 22:56:39,183 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:56:39,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-11-06 22:56:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-11-06 22:56:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-11-06 22:56:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-11-06 22:56:39,188 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 28 [2018-11-06 22:56:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:39,189 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-11-06 22:56:39,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:56:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-11-06 22:56:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-11-06 22:56:39,190 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:39,190 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 7, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:39,190 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:39,191 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:39,191 INFO L82 PathProgramCache]: Analyzing trace with hash 242968718, now seen corresponding path program 4 times [2018-11-06 22:56:39,191 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:39,191 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:39,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:39,192 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:39,192 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:39,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:39,723 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:56:39,723 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:56:39,740 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:56:39,762 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:56:39,762 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:56:39,767 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:56:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 40 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-06 22:56:39,851 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:56:39,851 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2018-11-06 22:56:39,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-11-06 22:56:39,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-11-06 22:56:39,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:56:39,853 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2018-11-06 22:56:40,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:56:40,322 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2018-11-06 22:56:40,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-06 22:56:40,322 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2018-11-06 22:56:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:56:40,323 INFO L225 Difference]: With dead ends: 52 [2018-11-06 22:56:40,324 INFO L226 Difference]: Without dead ends: 39 [2018-11-06 22:56:40,324 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-11-06 22:56:40,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-11-06 22:56:40,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-11-06 22:56:40,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-06 22:56:40,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2018-11-06 22:56:40,330 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2018-11-06 22:56:40,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:56:40,330 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2018-11-06 22:56:40,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-11-06 22:56:40,331 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2018-11-06 22:56:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-11-06 22:56:40,332 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:56:40,332 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 8, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:56:40,332 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:56:40,332 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:56:40,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1678118351, now seen corresponding path program 5 times [2018-11-06 22:56:40,333 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:56:40,333 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:56:40,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:40,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:56:40,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:56:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:56:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:56:40,553 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:56:40,554 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:56:40,567 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 22:57:33,480 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2018-11-06 22:57:33,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:33,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-06 22:57:33,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:33,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2018-11-06 22:57:33,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-11-06 22:57:33,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-11-06 22:57:33,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:57:33,632 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 13 states. [2018-11-06 22:57:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:33,997 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-11-06 22:57:34,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-06 22:57:34,000 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-11-06 22:57:34,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:34,001 INFO L225 Difference]: With dead ends: 55 [2018-11-06 22:57:34,001 INFO L226 Difference]: Without dead ends: 42 [2018-11-06 22:57:34,002 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-11-06 22:57:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-11-06 22:57:34,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-11-06 22:57:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-11-06 22:57:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-11-06 22:57:34,007 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-11-06 22:57:34,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:34,008 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-11-06 22:57:34,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-11-06 22:57:34,008 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-11-06 22:57:34,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-11-06 22:57:34,009 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:34,009 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 9, 2, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:34,009 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:34,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:34,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1951195566, now seen corresponding path program 6 times [2018-11-06 22:57:34,010 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:34,010 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:34,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:34,011 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:34,011 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:34,557 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:34,558 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:57:34,566 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 22:57:34,588 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-11-06 22:57:34,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:34,590 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 72 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2018-11-06 22:57:34,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:34,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2018-11-06 22:57:34,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:57:34,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:57:34,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:57:34,728 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 17 states. [2018-11-06 22:57:36,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:36,839 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2018-11-06 22:57:36,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-06 22:57:36,840 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2018-11-06 22:57:36,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:36,841 INFO L225 Difference]: With dead ends: 64 [2018-11-06 22:57:36,841 INFO L226 Difference]: Without dead ends: 51 [2018-11-06 22:57:36,842 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2018-11-06 22:57:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-06 22:57:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2018-11-06 22:57:36,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-11-06 22:57:36,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2018-11-06 22:57:36,848 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 40 [2018-11-06 22:57:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:36,848 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2018-11-06 22:57:36,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:57:36,848 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2018-11-06 22:57:36,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-11-06 22:57:36,849 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:36,849 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 10, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:36,850 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:36,850 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:36,850 INFO L82 PathProgramCache]: Analyzing trace with hash -141931124, now seen corresponding path program 7 times [2018-11-06 22:57:36,850 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:36,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:36,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:36,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:36,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:37,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:37,216 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:57:37,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:37,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 88 proven. 165 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-06 22:57:37,387 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:37,387 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 16 [2018-11-06 22:57:37,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-11-06 22:57:37,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-11-06 22:57:37,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:57:37,388 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 16 states. [2018-11-06 22:57:37,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:37,866 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2018-11-06 22:57:37,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-11-06 22:57:37,867 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2018-11-06 22:57:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:37,868 INFO L225 Difference]: With dead ends: 67 [2018-11-06 22:57:37,869 INFO L226 Difference]: Without dead ends: 51 [2018-11-06 22:57:37,869 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-11-06 22:57:37,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-11-06 22:57:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-11-06 22:57:37,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-11-06 22:57:37,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2018-11-06 22:57:37,875 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2018-11-06 22:57:37,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:37,876 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2018-11-06 22:57:37,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-11-06 22:57:37,876 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2018-11-06 22:57:37,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-11-06 22:57:37,877 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:37,877 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 11, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:37,877 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:37,877 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:37,878 INFO L82 PathProgramCache]: Analyzing trace with hash 871398063, now seen corresponding path program 8 times [2018-11-06 22:57:37,878 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:37,878 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:37,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:37,879 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 22:57:37,879 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:38,178 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:38,178 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:57:38,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 22:57:38,236 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 22:57:38,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:38,239 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:38,312 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:38,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:38,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2018-11-06 22:57:38,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-06 22:57:38,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-06 22:57:38,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:57:38,348 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 17 states. [2018-11-06 22:57:38,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:38,773 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2018-11-06 22:57:38,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-11-06 22:57:38,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2018-11-06 22:57:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:38,775 INFO L225 Difference]: With dead ends: 70 [2018-11-06 22:57:38,775 INFO L226 Difference]: Without dead ends: 54 [2018-11-06 22:57:38,776 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-11-06 22:57:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-11-06 22:57:38,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-11-06 22:57:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-06 22:57:38,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2018-11-06 22:57:38,784 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2018-11-06 22:57:38,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:38,785 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2018-11-06 22:57:38,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-06 22:57:38,785 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2018-11-06 22:57:38,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-11-06 22:57:38,786 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:38,786 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 12, 3, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:38,786 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:38,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:38,787 INFO L82 PathProgramCache]: Analyzing trace with hash -363915604, now seen corresponding path program 9 times [2018-11-06 22:57:38,787 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:38,787 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:38,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:38,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:38,788 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:39,269 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:39,269 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:57:39,284 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 22:57:39,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-11-06 22:57:39,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:39,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 132 proven. 15 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2018-11-06 22:57:39,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:39,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6] total 22 [2018-11-06 22:57:39,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 22:57:39,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 22:57:39,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2018-11-06 22:57:39,579 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 22 states. [2018-11-06 22:57:45,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:45,582 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2018-11-06 22:57:45,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-11-06 22:57:45,583 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2018-11-06 22:57:45,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:45,583 INFO L225 Difference]: With dead ends: 82 [2018-11-06 22:57:45,583 INFO L226 Difference]: Without dead ends: 66 [2018-11-06 22:57:45,584 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2018-11-06 22:57:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-11-06 22:57:45,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2018-11-06 22:57:45,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-11-06 22:57:45,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-11-06 22:57:45,589 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2018-11-06 22:57:45,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:45,589 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-11-06 22:57:45,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 22:57:45,590 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-11-06 22:57:45,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-11-06 22:57:45,590 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:45,591 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 13, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:45,591 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:45,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:45,591 INFO L82 PathProgramCache]: Analyzing trace with hash -820552626, now seen corresponding path program 10 times [2018-11-06 22:57:45,591 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:45,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:45,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:45,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:45,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 34 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:46,087 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:46,087 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:57:46,097 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 22:57:46,113 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 22:57:46,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 22:57:46,116 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 22:57:46,485 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 154 proven. 273 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-11-06 22:57:46,505 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 22:57:46,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 20 [2018-11-06 22:57:46,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-11-06 22:57:46,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-11-06 22:57:46,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:57:46,507 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 20 states. [2018-11-06 22:57:50,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 22:57:50,307 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2018-11-06 22:57:50,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-11-06 22:57:50,307 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2018-11-06 22:57:50,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 22:57:50,308 INFO L225 Difference]: With dead ends: 83 [2018-11-06 22:57:50,308 INFO L226 Difference]: Without dead ends: 65 [2018-11-06 22:57:50,309 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2018-11-06 22:57:50,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-11-06 22:57:50,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-11-06 22:57:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-11-06 22:57:50,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2018-11-06 22:57:50,317 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2018-11-06 22:57:50,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 22:57:50,317 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2018-11-06 22:57:50,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-11-06 22:57:50,318 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2018-11-06 22:57:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-11-06 22:57:50,318 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 22:57:50,319 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 15, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 22:57:50,319 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 22:57:50,319 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 22:57:50,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1817671022, now seen corresponding path program 11 times [2018-11-06 22:57:50,319 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 22:57:50,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 22:57:50,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:50,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 22:57:50,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 22:57:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 22:57:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 22:57:51,169 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 22:57:51,169 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 22:57:51,181 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-06 23:00:02,503 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2018-11-06 23:00:02,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:02,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:02,757 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:02,778 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:02,778 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2018-11-06 23:00:02,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-11-06 23:00:02,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-11-06 23:00:02,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2018-11-06 23:00:02,779 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 22 states. [2018-11-06 23:00:04,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:04,109 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2018-11-06 23:00:04,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-11-06 23:00:04,110 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 64 [2018-11-06 23:00:04,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:04,111 INFO L225 Difference]: With dead ends: 89 [2018-11-06 23:00:04,111 INFO L226 Difference]: Without dead ends: 71 [2018-11-06 23:00:04,112 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2018-11-06 23:00:04,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-11-06 23:00:04,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-11-06 23:00:04,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2018-11-06 23:00:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2018-11-06 23:00:04,118 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 64 [2018-11-06 23:00:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:04,118 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2018-11-06 23:00:04,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-11-06 23:00:04,118 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2018-11-06 23:00:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-11-06 23:00:04,119 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:04,120 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 17, 4, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:04,120 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:04,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:04,120 INFO L82 PathProgramCache]: Analyzing trace with hash 841496206, now seen corresponding path program 12 times [2018-11-06 23:00:04,120 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:04,121 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:04,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:04,121 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:04,121 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:04,846 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:04,846 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 23:00:04,854 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-06 23:00:36,304 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-11-06 23:00:36,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:36,449 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 238 proven. 26 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2018-11-06 23:00:36,658 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:36,658 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7] total 29 [2018-11-06 23:00:36,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-11-06 23:00:36,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-11-06 23:00:36,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2018-11-06 23:00:36,660 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 29 states. [2018-11-06 23:00:37,836 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2018-11-06 23:00:38,340 WARN L179 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 12 [2018-11-06 23:00:43,371 WARN L179 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2018-11-06 23:00:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:44,011 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2018-11-06 23:00:44,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-11-06 23:00:44,011 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 70 [2018-11-06 23:00:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:44,013 INFO L225 Difference]: With dead ends: 102 [2018-11-06 23:00:44,013 INFO L226 Difference]: Without dead ends: 84 [2018-11-06 23:00:44,014 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=256, Invalid=866, Unknown=0, NotChecked=0, Total=1122 [2018-11-06 23:00:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2018-11-06 23:00:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2018-11-06 23:00:44,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-11-06 23:00:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2018-11-06 23:00:44,023 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 70 [2018-11-06 23:00:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:44,023 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2018-11-06 23:00:44,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-11-06 23:00:44,023 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2018-11-06 23:00:44,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-11-06 23:00:44,024 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:44,025 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 19, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:44,025 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:44,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:44,025 INFO L82 PathProgramCache]: Analyzing trace with hash -511954481, now seen corresponding path program 13 times [2018-11-06 23:00:44,025 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:44,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:44,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:44,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:44,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:44,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:44,938 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:44,939 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 23:00:44,948 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 23:00:44,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:44,970 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:45,047 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 280 proven. 570 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-11-06 23:00:45,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:45,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 27 [2018-11-06 23:00:45,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-11-06 23:00:45,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-11-06 23:00:45,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-11-06 23:00:45,068 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 27 states. [2018-11-06 23:00:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:45,896 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2018-11-06 23:00:45,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-11-06 23:00:45,896 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2018-11-06 23:00:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:45,897 INFO L225 Difference]: With dead ends: 104 [2018-11-06 23:00:45,898 INFO L226 Difference]: Without dead ends: 83 [2018-11-06 23:00:45,899 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-11-06 23:00:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-11-06 23:00:45,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-11-06 23:00:45,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-11-06 23:00:45,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2018-11-06 23:00:45,906 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 79 [2018-11-06 23:00:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:45,906 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2018-11-06 23:00:45,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-11-06 23:00:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2018-11-06 23:00:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-11-06 23:00:45,907 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:45,908 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 20, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:45,908 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:45,908 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:45,908 INFO L82 PathProgramCache]: Analyzing trace with hash 984053004, now seen corresponding path program 14 times [2018-11-06 23:00:45,908 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:45,908 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:45,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:45,909 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-06 23:00:45,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:46,446 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:46,446 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 23:00:46,460 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-06 23:00:46,482 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-06 23:00:46,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:46,484 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:46,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:46,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2018-11-06 23:00:46,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-11-06 23:00:46,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-11-06 23:00:46,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-11-06 23:00:46,533 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 28 states. [2018-11-06 23:00:47,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:00:47,330 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2018-11-06 23:00:47,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-11-06 23:00:47,331 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2018-11-06 23:00:47,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:00:47,332 INFO L225 Difference]: With dead ends: 107 [2018-11-06 23:00:47,332 INFO L226 Difference]: Without dead ends: 86 [2018-11-06 23:00:47,333 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-11-06 23:00:47,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2018-11-06 23:00:47,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2018-11-06 23:00:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-11-06 23:00:47,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2018-11-06 23:00:47,341 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 82 [2018-11-06 23:00:47,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:00:47,341 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2018-11-06 23:00:47,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-11-06 23:00:47,341 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2018-11-06 23:00:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2018-11-06 23:00:47,342 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:00:47,342 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 21, 5, 1, 1, 1, 1, 1, 1] [2018-11-06 23:00:47,343 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:00:47,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:00:47,343 INFO L82 PathProgramCache]: Analyzing trace with hash -332591953, now seen corresponding path program 15 times [2018-11-06 23:00:47,343 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:00:47,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:00:47,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:47,344 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:00:47,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:00:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:00:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:00:48,162 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:00:48,162 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 23:00:48,171 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-06 23:00:48,203 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-11-06 23:00:48,203 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:00:48,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:00:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 357 proven. 40 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2018-11-06 23:00:48,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:00:48,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 8] total 35 [2018-11-06 23:00:48,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-11-06 23:00:48,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-11-06 23:00:48,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2018-11-06 23:00:48,503 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand 35 states. [2018-11-06 23:00:49,447 WARN L179 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 12 [2018-11-06 23:00:57,536 WARN L179 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 24 DAG size of output: 12 [2018-11-06 23:01:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:10,079 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2018-11-06 23:01:10,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-11-06 23:01:10,080 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 85 [2018-11-06 23:01:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:10,080 INFO L225 Difference]: With dead ends: 118 [2018-11-06 23:01:10,080 INFO L226 Difference]: Without dead ends: 97 [2018-11-06 23:01:10,081 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=342, Invalid=1294, Unknown=4, NotChecked=0, Total=1640 [2018-11-06 23:01:10,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-11-06 23:01:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2018-11-06 23:01:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-06 23:01:10,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2018-11-06 23:01:10,090 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 85 [2018-11-06 23:01:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:10,090 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2018-11-06 23:01:10,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-11-06 23:01:10,090 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2018-11-06 23:01:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2018-11-06 23:01:10,091 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:10,091 INFO L375 BasicCegarLoop]: trace histogram [29, 28, 22, 6, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:10,091 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:10,092 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:10,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1544017263, now seen corresponding path program 16 times [2018-11-06 23:01:10,092 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:10,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:10,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:10,093 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:01:10,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:10,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-06 23:01:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 56 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-06 23:01:10,892 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-06 23:01:10,892 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-06 23:01:10,901 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-06 23:01:10,927 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-06 23:01:10,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-06 23:01:10,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-06 23:01:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 391 proven. 759 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-11-06 23:01:11,062 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-06 23:01:11,063 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 25] total 31 [2018-11-06 23:01:11,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-06 23:01:11,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-06 23:01:11,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2018-11-06 23:01:11,064 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 31 states. [2018-11-06 23:01:12,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-06 23:01:12,010 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2018-11-06 23:01:12,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-11-06 23:01:12,011 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2018-11-06 23:01:12,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-06 23:01:12,012 INFO L225 Difference]: With dead ends: 122 [2018-11-06 23:01:12,012 INFO L226 Difference]: Without dead ends: 98 [2018-11-06 23:01:12,013 INFO L604 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2018-11-06 23:01:12,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-11-06 23:01:12,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-11-06 23:01:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-11-06 23:01:12,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2018-11-06 23:01:12,021 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 91 [2018-11-06 23:01:12,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-06 23:01:12,021 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2018-11-06 23:01:12,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-06 23:01:12,022 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2018-11-06 23:01:12,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-11-06 23:01:12,022 INFO L367 BasicCegarLoop]: Found error trace [2018-11-06 23:01:12,023 INFO L375 BasicCegarLoop]: trace histogram [31, 30, 24, 6, 1, 1, 1, 1, 1, 1] [2018-11-06 23:01:12,023 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-06 23:01:12,023 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-06 23:01:12,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1826076017, now seen corresponding path program 17 times [2018-11-06 23:01:12,023 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-06 23:01:12,023 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-06 23:01:12,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:12,024 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-06 23:01:12,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-06 23:01:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2018-11-06 23:01:13,621 WARN L549 AbstractCegarLoop]: Verification canceled [2018-11-06 23:01:13,624 WARN L205 ceAbstractionStarter]: Timeout [2018-11-06 23:01:13,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 11:01:13 BoogieIcfgContainer [2018-11-06 23:01:13,625 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-06 23:01:13,625 INFO L168 Benchmark]: Toolchain (without parser) took 279253.75 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 924.8 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -821.8 MB). Peak memory consumption was 103.1 MB. Max. memory is 7.1 GB. [2018-11-06 23:01:13,626 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 23:01:13,627 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.96 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-11-06 23:01:13,628 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.87 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 23:01:13,628 INFO L168 Benchmark]: Boogie Preprocessor took 19.62 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-11-06 23:01:13,628 INFO L168 Benchmark]: RCFGBuilder took 306.53 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 739.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -792.1 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. [2018-11-06 23:01:13,629 INFO L168 Benchmark]: TraceAbstraction took 278634.68 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 185.6 MB). Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: -40.2 MB). Peak memory consumption was 145.4 MB. Max. memory is 7.1 GB. [2018-11-06 23:01:13,634 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.96 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 34.87 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 19.62 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 306.53 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 739.2 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -792.1 MB). Peak memory consumption was 26.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 278634.68 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 185.6 MB). Free memory was 2.2 GB in the beginning and 2.2 GB in the end (delta: -40.2 MB). Peak memory consumption was 145.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 2]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 2). Cancelled while BasicCegarLoop was analyzing trace of length 98 with TraceHistMax 31,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 14 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. TIMEOUT Result, 278.5s OverallTime, 22 OverallIterations, 31 TraceHistogramMax, 48.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 376 SDtfs, 195 SDslu, 4498 SDs, 0 SdLazy, 9031 SolverSat, 295 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 26.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1244 GetRequests, 878 SyntacticMatches, 52 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 29.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 216.1s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 1815 NumberOfCodeBlocks, 1680 NumberOfCodeBlocksAsserted, 114 NumberOfCheckSat, 1775 ConstructedInterpolants, 0 QuantifiedInterpolants, 598147 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1321 ConjunctsInSsa, 471 ConjunctsInUnsatCore, 40 InterpolantComputations, 3 PerfectInterpolantSequences, 3541/14560 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown