java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-0fd1304 [2018-10-23 15:53:55,061 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 15:53:55,065 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 15:53:55,083 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 15:53:55,083 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 15:53:55,084 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 15:53:55,085 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 15:53:55,087 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 15:53:55,089 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 15:53:55,089 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 15:53:55,090 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 15:53:55,091 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 15:53:55,092 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 15:53:55,092 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 15:53:55,099 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 15:53:55,100 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 15:53:55,101 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 15:53:55,106 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 15:53:55,111 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 15:53:55,112 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 15:53:55,115 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 15:53:55,116 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 15:53:55,121 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 15:53:55,136 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2018-10-23 15:53:55,156 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 15:53:55,156 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 15:53:55,157 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 15:53:55,157 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-23 15:53:55,159 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-23 15:53:55,159 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-23 15:53:55,160 INFO L133 SettingsManager]: * Use SBE=true [2018-10-23 15:53:55,160 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 15:53:55,160 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 15:53:55,160 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 15:53:55,160 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 15:53:55,161 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 15:53:55,161 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 15:53:55,161 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 15:53:55,161 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 15:53:55,161 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 15:53:55,162 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 15:53:55,163 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 15:53:55,163 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 15:53:55,163 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 15:53:55,163 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 15:53:55,164 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 15:53:55,164 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 15:53:55,164 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-23 15:53:55,164 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 15:53:55,164 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 15:53:55,165 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 15:53:55,165 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 15:53:55,210 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 15:53:55,224 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 15:53:55,227 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 15:53:55,229 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 15:53:55,229 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 15:53:55,230 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013_true-unreach-call.i [2018-10-23 15:53:55,287 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ab0ff4e19/5dc8b5c75d2b4dd8838222e485d74ec4/FLAGb71c9ce1a [2018-10-23 15:53:55,731 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 15:53:55,733 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013_true-unreach-call.i [2018-10-23 15:53:55,747 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ab0ff4e19/5dc8b5c75d2b4dd8838222e485d74ec4/FLAGb71c9ce1a [2018-10-23 15:53:55,763 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/ab0ff4e19/5dc8b5c75d2b4dd8838222e485d74ec4 [2018-10-23 15:53:55,772 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 15:53:55,774 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 15:53:55,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 15:53:55,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 15:53:55,778 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 15:53:55,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 03:53:55" (1/1) ... [2018-10-23 15:53:55,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a2dad3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:53:55, skipping insertion in model container [2018-10-23 15:53:55,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 03:53:55" (1/1) ... [2018-10-23 15:53:55,795 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 15:53:55,825 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 15:53:56,019 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 15:53:56,025 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 15:53:56,052 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 15:53:56,071 INFO L193 MainTranslator]: Completed translation [2018-10-23 15:53:56,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:53:56 WrapperNode [2018-10-23 15:53:56,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 15:53:56,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 15:53:56,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 15:53:56,073 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 15:53:56,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:53:56" (1/1) ... [2018-10-23 15:53:56,090 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:53:56" (1/1) ... [2018-10-23 15:53:56,113 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 15:53:56,114 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 15:53:56,114 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 15:53:56,114 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 15:53:56,124 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:53:56" (1/1) ... [2018-10-23 15:53:56,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:53:56" (1/1) ... [2018-10-23 15:53:56,126 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:53:56" (1/1) ... [2018-10-23 15:53:56,126 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:53:56" (1/1) ... [2018-10-23 15:53:56,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:53:56" (1/1) ... [2018-10-23 15:53:56,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:53:56" (1/1) ... [2018-10-23 15:53:56,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:53:56" (1/1) ... [2018-10-23 15:53:56,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 15:53:56,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 15:53:56,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 15:53:56,144 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 15:53:56,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:53:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 15:53:56,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 15:53:56,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 15:53:56,502 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 15:53:56,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 03:53:56 BoogieIcfgContainer [2018-10-23 15:53:56,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 15:53:56,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 15:53:56,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 15:53:56,507 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 15:53:56,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 03:53:55" (1/3) ... [2018-10-23 15:53:56,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3684b558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 03:53:56, skipping insertion in model container [2018-10-23 15:53:56,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 03:53:56" (2/3) ... [2018-10-23 15:53:56,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3684b558 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 03:53:56, skipping insertion in model container [2018-10-23 15:53:56,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 03:53:56" (3/3) ... [2018-10-23 15:53:56,511 INFO L112 eAbstractionObserver]: Analyzing ICFG ddlm2013_true-unreach-call.i [2018-10-23 15:53:56,521 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 15:53:56,532 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 15:53:56,549 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 15:53:56,582 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-10-23 15:53:56,583 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 15:53:56,583 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 15:53:56,584 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 15:53:56,584 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 15:53:56,584 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 15:53:56,584 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 15:53:56,584 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 15:53:56,585 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 15:53:56,600 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2018-10-23 15:53:56,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-23 15:53:56,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:53:56,607 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:53:56,610 INFO L424 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:53:56,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:53:56,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1805490696, now seen corresponding path program 1 times [2018-10-23 15:53:56,618 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:53:56,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:53:56,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:56,671 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:53:56,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:53:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:53:56,729 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:53:56,729 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 15:53:56,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 15:53:56,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 15:53:56,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 15:53:56,752 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2018-10-23 15:53:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:53:56,770 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-23 15:53:56,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 15:53:56,771 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2018-10-23 15:53:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:53:56,783 INFO L225 Difference]: With dead ends: 25 [2018-10-23 15:53:56,783 INFO L226 Difference]: Without dead ends: 11 [2018-10-23 15:53:56,787 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 15:53:56,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-23 15:53:56,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-23 15:53:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-23 15:53:56,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2018-10-23 15:53:56,824 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2018-10-23 15:53:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:53:56,824 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2018-10-23 15:53:56,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 15:53:56,825 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2018-10-23 15:53:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-23 15:53:56,826 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:53:56,826 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:53:56,826 INFO L424 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:53:56,826 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:53:56,827 INFO L82 PathProgramCache]: Analyzing trace with hash -535876044, now seen corresponding path program 1 times [2018-10-23 15:53:56,827 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:53:56,827 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:53:56,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:56,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:53:56,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:53:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:53:57,057 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:53:57,057 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-23 15:53:57,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-23 15:53:57,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-23 15:53:57,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-23 15:53:57,060 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 4 states. [2018-10-23 15:53:57,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:53:57,151 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2018-10-23 15:53:57,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-23 15:53:57,151 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-23 15:53:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:53:57,152 INFO L225 Difference]: With dead ends: 18 [2018-10-23 15:53:57,152 INFO L226 Difference]: Without dead ends: 14 [2018-10-23 15:53:57,154 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-23 15:53:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-23 15:53:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-23 15:53:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-23 15:53:57,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-23 15:53:57,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-10-23 15:53:57,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:53:57,158 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-23 15:53:57,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-23 15:53:57,158 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-23 15:53:57,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 15:53:57,159 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:53:57,159 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:53:57,160 INFO L424 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:53:57,160 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:53:57,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1734979431, now seen corresponding path program 1 times [2018-10-23 15:53:57,160 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:53:57,160 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:53:57,161 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:57,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:53:57,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:53:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:53:57,391 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:53:57,391 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:53:57,413 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:53:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:53:57,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:53:57,726 WARN L179 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-10-23 15:53:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:53:57,877 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:53:57,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-10-23 15:53:57,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 15:53:57,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 15:53:57,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-10-23 15:53:57,879 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 9 states. [2018-10-23 15:53:58,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:53:58,001 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2018-10-23 15:53:58,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 15:53:58,002 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2018-10-23 15:53:58,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:53:58,003 INFO L225 Difference]: With dead ends: 25 [2018-10-23 15:53:58,004 INFO L226 Difference]: Without dead ends: 21 [2018-10-23 15:53:58,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2018-10-23 15:53:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-23 15:53:58,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-10-23 15:53:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-23 15:53:58,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2018-10-23 15:53:58,008 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2018-10-23 15:53:58,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:53:58,009 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2018-10-23 15:53:58,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 15:53:58,009 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2018-10-23 15:53:58,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-23 15:53:58,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:53:58,010 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:53:58,010 INFO L424 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:53:58,010 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:53:58,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1033914853, now seen corresponding path program 1 times [2018-10-23 15:53:58,011 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:53:58,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:53:58,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:58,012 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:53:58,013 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:53:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-23 15:53:58,052 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 15:53:58,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 15:53:58,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 15:53:58,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 15:53:58,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 15:53:58,054 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 3 states. [2018-10-23 15:53:58,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:53:58,063 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2018-10-23 15:53:58,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 15:53:58,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2018-10-23 15:53:58,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:53:58,064 INFO L225 Difference]: With dead ends: 29 [2018-10-23 15:53:58,064 INFO L226 Difference]: Without dead ends: 18 [2018-10-23 15:53:58,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 15:53:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-23 15:53:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-23 15:53:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-23 15:53:58,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2018-10-23 15:53:58,070 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2018-10-23 15:53:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:53:58,070 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2018-10-23 15:53:58,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 15:53:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2018-10-23 15:53:58,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-23 15:53:58,071 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:53:58,071 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:53:58,071 INFO L424 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:53:58,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:53:58,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1706313602, now seen corresponding path program 2 times [2018-10-23 15:53:58,072 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:53:58,072 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:53:58,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:58,073 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:53:58,073 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:58,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:53:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:53:58,514 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:53:58,515 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 15:53:58,522 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:53:58,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:53:58,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:53:58,542 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:53:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:53:59,079 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:53:59,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-10-23 15:53:59,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 15:53:59,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 15:53:59,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-10-23 15:53:59,082 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 13 states. [2018-10-23 15:53:59,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:53:59,517 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2018-10-23 15:53:59,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-23 15:53:59,518 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2018-10-23 15:53:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:53:59,520 INFO L225 Difference]: With dead ends: 51 [2018-10-23 15:53:59,520 INFO L226 Difference]: Without dead ends: 32 [2018-10-23 15:53:59,521 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2018-10-23 15:53:59,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-23 15:53:59,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2018-10-23 15:53:59,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-23 15:53:59,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2018-10-23 15:53:59,525 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2018-10-23 15:53:59,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:53:59,526 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2018-10-23 15:53:59,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 15:53:59,526 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2018-10-23 15:53:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-23 15:53:59,527 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:53:59,527 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:53:59,527 INFO L424 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:53:59,527 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:53:59,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1688597659, now seen corresponding path program 1 times [2018-10-23 15:53:59,528 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:53:59,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:53:59,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:59,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:53:59,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:53:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-23 15:53:59,756 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:53:59,756 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 15:53:59,769 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:53:59,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:53:59,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:53:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-23 15:53:59,837 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:53:59,837 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-10-23 15:53:59,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-23 15:53:59,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-23 15:53:59,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 15:53:59,839 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2018-10-23 15:53:59,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:53:59,911 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2018-10-23 15:53:59,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-23 15:53:59,913 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2018-10-23 15:53:59,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:53:59,913 INFO L225 Difference]: With dead ends: 40 [2018-10-23 15:53:59,914 INFO L226 Difference]: Without dead ends: 29 [2018-10-23 15:53:59,914 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-23 15:53:59,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-23 15:53:59,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2018-10-23 15:53:59,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-23 15:53:59,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-10-23 15:53:59,918 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2018-10-23 15:53:59,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:53:59,919 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-10-23 15:53:59,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-23 15:53:59,919 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2018-10-23 15:53:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-23 15:53:59,920 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:53:59,920 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:53:59,920 INFO L424 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:53:59,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:53:59,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1106230858, now seen corresponding path program 2 times [2018-10-23 15:53:59,921 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:53:59,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:53:59,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:59,922 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 15:53:59,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:53:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:54:00,173 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-23 15:54:00,173 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:54:00,173 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 15:54:00,181 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 15:54:00,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 15:54:00,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:54:00,210 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:54:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-23 15:54:00,244 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:54:00,244 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-23 15:54:00,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 15:54:00,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 15:54:00,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-23 15:54:00,246 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 6 states. [2018-10-23 15:54:00,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:54:00,298 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2018-10-23 15:54:00,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 15:54:00,300 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-10-23 15:54:00,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:54:00,301 INFO L225 Difference]: With dead ends: 44 [2018-10-23 15:54:00,301 INFO L226 Difference]: Without dead ends: 33 [2018-10-23 15:54:00,301 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-23 15:54:00,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-23 15:54:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2018-10-23 15:54:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-23 15:54:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2018-10-23 15:54:00,306 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2018-10-23 15:54:00,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:54:00,306 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2018-10-23 15:54:00,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 15:54:00,306 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2018-10-23 15:54:00,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-23 15:54:00,307 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:54:00,307 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:54:00,308 INFO L424 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:54:00,308 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:54:00,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1861711535, now seen corresponding path program 3 times [2018-10-23 15:54:00,308 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:54:00,308 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:54:00,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:54:00,309 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:54:00,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:54:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:54:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-23 15:54:00,487 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:54:00,487 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 15:54:00,496 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-23 15:54:00,524 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-23 15:54:00,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:54:00,527 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:54:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-23 15:54:00,751 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 15:54:00,751 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2018-10-23 15:54:00,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 15:54:00,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 15:54:00,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-23 15:54:00,752 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2018-10-23 15:54:00,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:54:00,853 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2018-10-23 15:54:00,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 15:54:00,855 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2018-10-23 15:54:00,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:54:00,856 INFO L225 Difference]: With dead ends: 48 [2018-10-23 15:54:00,856 INFO L226 Difference]: Without dead ends: 37 [2018-10-23 15:54:00,857 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-23 15:54:00,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-23 15:54:00,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2018-10-23 15:54:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-23 15:54:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2018-10-23 15:54:00,861 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2018-10-23 15:54:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:54:00,861 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2018-10-23 15:54:00,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 15:54:00,862 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2018-10-23 15:54:00,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-23 15:54:00,863 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:54:00,863 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:54:00,863 INFO L424 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:54:00,863 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:54:00,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1354689302, now seen corresponding path program 4 times [2018-10-23 15:54:00,864 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:54:00,864 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:54:00,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:54:00,865 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:54:00,865 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:54:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:54:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-23 15:54:01,485 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:54:01,485 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 15:54:01,501 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 15:54:01,531 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 15:54:01,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:54:01,535 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:54:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-23 15:54:01,607 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-23 15:54:01,607 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-10-23 15:54:01,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 15:54:01,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 15:54:01,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-23 15:54:01,609 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 8 states. [2018-10-23 15:54:01,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:54:01,715 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2018-10-23 15:54:01,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 15:54:01,721 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2018-10-23 15:54:01,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:54:01,722 INFO L225 Difference]: With dead ends: 52 [2018-10-23 15:54:01,722 INFO L226 Difference]: Without dead ends: 41 [2018-10-23 15:54:01,723 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-23 15:54:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-23 15:54:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2018-10-23 15:54:01,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-23 15:54:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2018-10-23 15:54:01,727 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 33 [2018-10-23 15:54:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:54:01,727 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2018-10-23 15:54:01,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 15:54:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2018-10-23 15:54:01,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-23 15:54:01,729 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 15:54:01,729 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 15:54:01,729 INFO L424 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 15:54:01,729 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 15:54:01,730 INFO L82 PathProgramCache]: Analyzing trace with hash 898526843, now seen corresponding path program 5 times [2018-10-23 15:54:01,730 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-23 15:54:01,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-23 15:54:01,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:54:01,731 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 15:54:01,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 15:54:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 15:54:02,317 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 21 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 15:54:02,318 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 15:54:02,318 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-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 [2018-10-23 15:54:02,328 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-23 15:54:02,354 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-23 15:54:02,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 15:54:02,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 15:54:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-10-23 15:54:02,500 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-10-23 15:54:02,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2018-10-23 15:54:02,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 15:54:02,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 15:54:02,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-23 15:54:02,502 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 11 states. [2018-10-23 15:54:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 15:54:02,716 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2018-10-23 15:54:02,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 15:54:02,717 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2018-10-23 15:54:02,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 15:54:02,718 INFO L225 Difference]: With dead ends: 49 [2018-10-23 15:54:02,718 INFO L226 Difference]: Without dead ends: 0 [2018-10-23 15:54:02,720 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2018-10-23 15:54:02,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-23 15:54:02,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-23 15:54:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-23 15:54:02,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-23 15:54:02,721 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2018-10-23 15:54:02,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 15:54:02,721 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-23 15:54:02,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 15:54:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-23 15:54:02,721 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-23 15:54:02,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-23 15:54:02,764 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2018-10-23 15:54:02,764 INFO L425 ceAbstractionStarter]: For program point L31-1(lines 31 33) no Hoare annotation was computed. [2018-10-23 15:54:02,764 INFO L425 ceAbstractionStarter]: For program point L25(lines 25 29) no Hoare annotation was computed. [2018-10-23 15:54:02,765 INFO L425 ceAbstractionStarter]: For program point L25-2(lines 10 35) no Hoare annotation was computed. [2018-10-23 15:54:02,765 INFO L425 ceAbstractionStarter]: For program point L21(lines 21 30) no Hoare annotation was computed. [2018-10-23 15:54:02,765 INFO L425 ceAbstractionStarter]: For program point L21-1(lines 21 30) no Hoare annotation was computed. [2018-10-23 15:54:02,765 INFO L425 ceAbstractionStarter]: For program point L21-3(lines 10 35) no Hoare annotation was computed. [2018-10-23 15:54:02,765 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2018-10-23 15:54:02,766 INFO L425 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2018-10-23 15:54:02,766 INFO L428 ceAbstractionStarter]: At program point L34(lines 10 35) the Hoare annotation is: true [2018-10-23 15:54:02,766 INFO L425 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2018-10-23 15:54:02,766 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2018-10-23 15:54:02,766 INFO L425 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2018-10-23 15:54:02,766 INFO L425 ceAbstractionStarter]: For program point L16(lines 16 20) no Hoare annotation was computed. [2018-10-23 15:54:02,767 INFO L425 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2018-10-23 15:54:02,767 INFO L428 ceAbstractionStarter]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2018-10-23 15:54:02,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 03:54:02 BoogieIcfgContainer [2018-10-23 15:54:02,773 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 15:54:02,774 INFO L168 Benchmark]: Toolchain (without parser) took 7001.13 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 757.1 MB). Free memory was 1.4 GB in the beginning and 1.9 GB in the end (delta: -462.8 MB). Peak memory consumption was 294.3 MB. Max. memory is 7.1 GB. [2018-10-23 15:54:02,775 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 15:54:02,776 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.61 ms. Allocated memory is still 1.6 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-23 15:54:02,777 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 15:54:02,777 INFO L168 Benchmark]: Boogie Preprocessor took 25.03 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 15:54:02,778 INFO L168 Benchmark]: RCFGBuilder took 363.36 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 757.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -810.7 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-23 15:54:02,779 INFO L168 Benchmark]: TraceAbstraction took 6269.70 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 337.4 MB). Peak memory consumption was 337.4 MB. Max. memory is 7.1 GB. [2018-10-23 15:54:02,783 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 297.61 ms. Allocated memory is still 1.6 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 41.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.03 ms. Allocated memory is still 1.6 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 363.36 ms. Allocated memory was 1.6 GB in the beginning and 2.3 GB in the end (delta: 757.1 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -810.7 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6269.70 ms. Allocated memory is still 2.3 GB. Free memory was 2.2 GB in the beginning and 1.9 GB in the end (delta: 337.4 MB). Peak memory consumption was 337.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 3]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. SAFE Result, 6.1s OverallTime, 10 OverallIterations, 8 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 160 SDtfs, 60 SDslu, 502 SDs, 0 SdLazy, 472 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 242 GetRequests, 173 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=9, 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: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 25 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 4 NumberOfFragments, 2 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 379 NumberOfCodeBlocks, 354 NumberOfCodeBlocksAsserted, 27 NumberOfCheckSat, 362 ConstructedInterpolants, 0 QuantifiedInterpolants, 39608 SizeOfPredicates, 15 NumberOfNonLiveVariables, 494 ConjunctsInSsa, 81 ConjunctsInUnsatCore, 17 InterpolantComputations, 5 PerfectInterpolantSequences, 373/619 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...