java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf -i ../../../trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-d380424 [2018-10-24 12:24:22,081 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-24 12:24:22,083 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-24 12:24:22,095 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-24 12:24:22,095 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-24 12:24:22,096 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-24 12:24:22,098 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-24 12:24:22,099 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-24 12:24:22,101 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-24 12:24:22,102 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-24 12:24:22,103 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-24 12:24:22,104 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-24 12:24:22,105 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-24 12:24:22,106 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-24 12:24:22,111 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-24 12:24:22,112 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-24 12:24:22,113 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-24 12:24:22,116 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-24 12:24:22,120 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-24 12:24:22,124 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-24 12:24:22,125 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-24 12:24:22,127 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-24 12:24:22,130 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-24 12:24:22,141 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default-EXP.epf [2018-10-24 12:24:22,170 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-24 12:24:22,170 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-24 12:24:22,171 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-24 12:24:22,171 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-24 12:24:22,171 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-24 12:24:22,172 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-24 12:24:22,172 INFO L133 SettingsManager]: * Explicit value domain=true [2018-10-24 12:24:22,172 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-24 12:24:22,172 INFO L133 SettingsManager]: * Octagon Domain=false [2018-10-24 12:24:22,173 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-24 12:24:22,173 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-24 12:24:22,173 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-24 12:24:22,173 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-24 12:24:22,173 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-24 12:24:22,174 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-24 12:24:22,174 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-24 12:24:22,174 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-24 12:24:22,175 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-24 12:24:22,176 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-24 12:24:22,176 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-24 12:24:22,176 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-24 12:24:22,176 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-24 12:24:22,176 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-24 12:24:22,177 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-24 12:24:22,177 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-24 12:24:22,177 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-24 12:24:22,177 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-24 12:24:22,178 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-24 12:24:22,178 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-24 12:24:22,178 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-24 12:24:22,178 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-24 12:24:22,179 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-24 12:24:22,179 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-24 12:24:22,179 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-24 12:24:22,179 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-24 12:24:22,179 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-24 12:24:22,248 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-24 12:24:22,265 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-24 12:24:22,269 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-24 12:24:22,271 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-24 12:24:22,272 INFO L276 PluginConnector]: CDTParser initialized [2018-10-24 12:24:22,273 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i [2018-10-24 12:24:22,334 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/558e09640/251bd15129ab41fbb61b8ac8ed17b847/FLAG8491c68a7 [2018-10-24 12:24:22,793 INFO L298 CDTParser]: Found 1 translation units. [2018-10-24 12:24:22,794 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch_true-unreach-call.i [2018-10-24 12:24:22,800 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/558e09640/251bd15129ab41fbb61b8ac8ed17b847/FLAG8491c68a7 [2018-10-24 12:24:22,817 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/558e09640/251bd15129ab41fbb61b8ac8ed17b847 [2018-10-24 12:24:22,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-24 12:24:22,832 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-24 12:24:22,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-24 12:24:22,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-24 12:24:22,839 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-24 12:24:22,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:24:22" (1/1) ... [2018-10-24 12:24:22,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ea74f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:22, skipping insertion in model container [2018-10-24 12:24:22,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:24:22" (1/1) ... [2018-10-24 12:24:22,854 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-24 12:24:22,877 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-24 12:24:23,079 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:24:23,089 INFO L189 MainTranslator]: Completed pre-run [2018-10-24 12:24:23,110 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-24 12:24:23,129 INFO L193 MainTranslator]: Completed translation [2018-10-24 12:24:23,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:23 WrapperNode [2018-10-24 12:24:23,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-24 12:24:23,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-24 12:24:23,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-24 12:24:23,131 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-24 12:24:23,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:23" (1/1) ... [2018-10-24 12:24:23,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:23" (1/1) ... [2018-10-24 12:24:23,174 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-24 12:24:23,175 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-24 12:24:23,175 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-24 12:24:23,175 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-24 12:24:23,186 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:23" (1/1) ... [2018-10-24 12:24:23,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:23" (1/1) ... [2018-10-24 12:24:23,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:23" (1/1) ... [2018-10-24 12:24:23,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:23" (1/1) ... [2018-10-24 12:24:23,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:23" (1/1) ... [2018-10-24 12:24:23,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:23" (1/1) ... [2018-10-24 12:24:23,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:23" (1/1) ... [2018-10-24 12:24:23,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-24 12:24:23,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-24 12:24:23,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-24 12:24:23,215 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-24 12:24:23,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:23" (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 [2018-10-24 12:24:23,376 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-24 12:24:23,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-24 12:24:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2018-10-24 12:24:23,377 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2018-10-24 12:24:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-24 12:24:23,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-24 12:24:23,377 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-24 12:24:23,377 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-24 12:24:23,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-24 12:24:23,378 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-24 12:24:23,853 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-24 12:24:23,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:24:23 BoogieIcfgContainer [2018-10-24 12:24:23,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-24 12:24:23,855 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-24 12:24:23,855 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-24 12:24:23,858 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-24 12:24:23,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:24:22" (1/3) ... [2018-10-24 12:24:23,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d36072a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:24:23, skipping insertion in model container [2018-10-24 12:24:23,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:24:23" (2/3) ... [2018-10-24 12:24:23,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d36072a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:24:23, skipping insertion in model container [2018-10-24 12:24:23,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:24:23" (3/3) ... [2018-10-24 12:24:23,862 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_sea.ch_true-unreach-call.i [2018-10-24 12:24:23,872 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-24 12:24:23,880 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-24 12:24:23,897 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-24 12:24:23,930 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-24 12:24:23,931 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-24 12:24:23,931 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-24 12:24:23,931 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-24 12:24:23,931 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-24 12:24:23,931 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-24 12:24:23,931 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-24 12:24:23,932 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-24 12:24:23,950 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2018-10-24 12:24:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-24 12:24:23,956 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:23,957 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:23,959 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:23,965 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:23,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1679407704, now seen corresponding path program 1 times [2018-10-24 12:24:23,968 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:24,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:24,022 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:24,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:24,022 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:24,188 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:24:24,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-24 12:24:24,189 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:24:24,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-24 12:24:24,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-24 12:24:24,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-24 12:24:24,209 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 2 states. [2018-10-24 12:24:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:24,233 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2018-10-24 12:24:24,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-24 12:24:24,234 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2018-10-24 12:24:24,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:24,243 INFO L225 Difference]: With dead ends: 44 [2018-10-24 12:24:24,244 INFO L226 Difference]: Without dead ends: 21 [2018-10-24 12:24:24,247 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 [2018-10-24 12:24:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-24 12:24:24,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-24 12:24:24,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 12:24:24,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-24 12:24:24,285 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2018-10-24 12:24:24,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:24,285 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-24 12:24:24,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-24 12:24:24,285 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-24 12:24:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 12:24:24,286 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:24,287 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:24,287 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:24,287 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:24,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1597240285, now seen corresponding path program 1 times [2018-10-24 12:24:24,288 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:24,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:24,289 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:24,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:24,290 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:24,506 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:24:24,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-10-24 12:24:24,507 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:24:24,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-24 12:24:24,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-24 12:24:24,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:24:24,510 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2018-10-24 12:24:24,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:24,584 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2018-10-24 12:24:24,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-24 12:24:24,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2018-10-24 12:24:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:24,586 INFO L225 Difference]: With dead ends: 29 [2018-10-24 12:24:24,586 INFO L226 Difference]: Without dead ends: 21 [2018-10-24 12:24:24,588 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-24 12:24:24,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-24 12:24:24,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-24 12:24:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-24 12:24:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-10-24 12:24:24,592 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2018-10-24 12:24:24,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:24,593 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-10-24 12:24:24,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-24 12:24:24,593 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2018-10-24 12:24:24,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-24 12:24:24,594 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:24,594 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:24,594 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:24,595 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:24,595 INFO L82 PathProgramCache]: Analyzing trace with hash 145570050, now seen corresponding path program 1 times [2018-10-24 12:24:24,595 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:24,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:24,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:24,596 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:24,597 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:24,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:24,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:24,822 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:24:24,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-10-24 12:24:24,823 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:24:24,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-24 12:24:24,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-24 12:24:24,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-24 12:24:24,824 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2018-10-24 12:24:25,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:25,115 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2018-10-24 12:24:25,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-24 12:24:25,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2018-10-24 12:24:25,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:25,116 INFO L225 Difference]: With dead ends: 34 [2018-10-24 12:24:25,117 INFO L226 Difference]: Without dead ends: 25 [2018-10-24 12:24:25,117 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-24 12:24:25,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-24 12:24:25,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-24 12:24:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-24 12:24:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-24 12:24:25,126 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2018-10-24 12:24:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:25,127 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-24 12:24:25,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-24 12:24:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-24 12:24:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-24 12:24:25,128 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:25,129 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:25,129 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:25,129 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:25,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1819847252, now seen corresponding path program 1 times [2018-10-24 12:24:25,130 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:25,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:25,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:25,131 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:25,131 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:25,658 WARN L179 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2018-10-24 12:24:25,875 WARN L179 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 12:24:26,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:26,016 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:26,016 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:24:26,017 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-10-24 12:24:26,019 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [8], [11], [17], [19], [26], [27], [31], [33], [37], [40], [42], [48], [49], [50], [52], [53], [54] [2018-10-24 12:24:26,056 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:24:26,056 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:24:26,634 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:24:26,636 INFO L272 AbstractInterpreter]: Visited 21 different actions 42 times. Merged at 7 different actions 18 times. Never widened. Found 4 fixpoints after 3 different actions. Largest state had 29 variables. [2018-10-24 12:24:26,676 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:26,678 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:24:26,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:26,678 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:24:26,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:26,687 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:24:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:26,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:27,122 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:24:27,304 WARN L179 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2018-10-24 12:24:27,447 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-10-24 12:24:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:28,082 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:24:28,082 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2018-10-24 12:24:28,082 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:24:28,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-24 12:24:28,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-24 12:24:28,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2018-10-24 12:24:28,085 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-10-24 12:24:28,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:28,612 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2018-10-24 12:24:28,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-24 12:24:28,613 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-10-24 12:24:28,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:28,616 INFO L225 Difference]: With dead ends: 43 [2018-10-24 12:24:28,616 INFO L226 Difference]: Without dead ends: 34 [2018-10-24 12:24:28,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2018-10-24 12:24:28,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-24 12:24:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2018-10-24 12:24:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-24 12:24:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-10-24 12:24:28,624 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2018-10-24 12:24:28,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:28,624 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-10-24 12:24:28,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-24 12:24:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-10-24 12:24:28,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-24 12:24:28,626 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:28,627 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:28,627 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:28,627 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:28,627 INFO L82 PathProgramCache]: Analyzing trace with hash 2082093034, now seen corresponding path program 1 times [2018-10-24 12:24:28,627 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:28,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:28,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:28,628 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:28,629 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:28,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:29,340 WARN L179 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 27 [2018-10-24 12:24:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:29,646 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:29,646 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:24:29,646 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 25 with the following transitions: [2018-10-24 12:24:29,646 INFO L202 CegarAbsIntRunner]: [0], [1], [2], [6], [8], [11], [13], [17], [19], [26], [27], [31], [33], [37], [40], [42], [48], [49], [50], [52], [53], [54] [2018-10-24 12:24:29,649 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, ExplicitValueDomain] [2018-10-24 12:24:29,649 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-24 12:24:29,840 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-24 12:24:29,841 INFO L272 AbstractInterpreter]: Visited 22 different actions 64 times. Merged at 8 different actions 33 times. Never widened. Found 11 fixpoints after 3 different actions. Largest state had 29 variables. [2018-10-24 12:24:29,880 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:29,881 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-24 12:24:29,881 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:29,881 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-24 12:24:29,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:29,900 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:24:29,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:29,945 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:30,014 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 24 [2018-10-24 12:24:30,032 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:24:30,032 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:24:30,069 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:30,074 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 25 [2018-10-24 12:24:30,078 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:24:30,079 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 12:24:30,086 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:32,107 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:32,108 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:91, output treesize:17 [2018-10-24 12:24:32,646 WARN L179 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2018-10-24 12:24:33,657 WARN L179 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2018-10-24 12:24:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:33,735 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:24:33,884 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2018-10-24 12:24:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:34,789 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:24:34,789 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 24 [2018-10-24 12:24:34,789 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:24:34,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-24 12:24:34,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-24 12:24:34,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2018-10-24 12:24:34,792 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 16 states. [2018-10-24 12:24:35,122 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2018-10-24 12:24:35,390 WARN L179 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2018-10-24 12:24:36,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:36,455 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2018-10-24 12:24:36,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-24 12:24:36,456 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2018-10-24 12:24:36,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:36,457 INFO L225 Difference]: With dead ends: 55 [2018-10-24 12:24:36,457 INFO L226 Difference]: Without dead ends: 43 [2018-10-24 12:24:36,459 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2018-10-24 12:24:36,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-24 12:24:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2018-10-24 12:24:36,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-24 12:24:36,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-10-24 12:24:36,465 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2018-10-24 12:24:36,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:36,466 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-10-24 12:24:36,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-24 12:24:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-10-24 12:24:36,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-24 12:24:36,467 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:36,467 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:36,468 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:36,468 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:36,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1253110442, now seen corresponding path program 2 times [2018-10-24 12:24:36,468 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:36,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:36,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:36,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:36,469 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:36,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:36,915 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:36,916 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:24:36,916 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:24:36,916 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:24:36,916 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:36,916 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 12:24:36,926 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:24:36,926 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:24:36,954 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2018-10-24 12:24:36,954 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:24:36,957 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-24 12:24:37,071 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:24:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-24 12:24:37,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:24:37,872 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 17 [2018-10-24 12:24:37,872 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:24:37,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-24 12:24:37,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-24 12:24:37,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2018-10-24 12:24:37,874 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 13 states. [2018-10-24 12:24:38,866 WARN L179 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 17 [2018-10-24 12:24:39,230 WARN L179 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 11 [2018-10-24 12:24:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:40,414 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2018-10-24 12:24:40,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 12:24:40,414 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2018-10-24 12:24:40,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:40,416 INFO L225 Difference]: With dead ends: 52 [2018-10-24 12:24:40,416 INFO L226 Difference]: Without dead ends: 40 [2018-10-24 12:24:40,417 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2018-10-24 12:24:40,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-24 12:24:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2018-10-24 12:24:40,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-24 12:24:40,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-10-24 12:24:40,424 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 28 [2018-10-24 12:24:40,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:40,424 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-10-24 12:24:40,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-24 12:24:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-10-24 12:24:40,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-24 12:24:40,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:40,425 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:40,425 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:40,426 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:40,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1646137452, now seen corresponding path program 2 times [2018-10-24 12:24:40,426 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:40,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:40,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:24:40,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:40,427 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:41,129 WARN L179 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 24 [2018-10-24 12:24:41,504 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2018-10-24 12:24:41,632 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2018-10-24 12:24:44,062 WARN L179 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2018-10-24 12:24:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:44,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:44,071 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:24:44,071 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:24:44,071 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:24:44,071 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:44,071 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 12:24:44,086 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:24:44,087 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:24:44,157 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-24 12:24:44,157 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:24:44,162 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:44,207 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-10-24 12:24:44,230 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:24:44,230 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:24:44,256 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:44,259 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-10-24 12:24:44,263 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:24:44,263 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 12:24:44,269 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:46,301 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:46,302 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-10-24 12:24:47,176 WARN L179 SmtUtils]: Spent 482.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2018-10-24 12:24:47,517 WARN L179 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2018-10-24 12:24:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:48,199 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:24:48,405 WARN L179 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 69 [2018-10-24 12:24:49,729 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2018-10-24 12:24:49,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:49,776 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:24:49,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2018-10-24 12:24:49,777 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:24:49,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 12:24:49,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 12:24:49,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2018-10-24 12:24:49,779 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 22 states. [2018-10-24 12:24:50,166 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2018-10-24 12:24:50,367 WARN L179 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2018-10-24 12:24:50,983 WARN L179 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 60 [2018-10-24 12:24:51,222 WARN L179 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2018-10-24 12:24:51,538 WARN L179 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 70 [2018-10-24 12:24:51,848 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 95 [2018-10-24 12:24:52,397 WARN L179 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 78 [2018-10-24 12:24:52,622 WARN L179 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2018-10-24 12:24:53,065 WARN L179 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2018-10-24 12:24:53,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:53,138 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2018-10-24 12:24:53,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 12:24:53,141 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2018-10-24 12:24:53,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:53,142 INFO L225 Difference]: With dead ends: 59 [2018-10-24 12:24:53,142 INFO L226 Difference]: Without dead ends: 47 [2018-10-24 12:24:53,144 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=281, Invalid=1975, Unknown=0, NotChecked=0, Total=2256 [2018-10-24 12:24:53,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-24 12:24:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 33. [2018-10-24 12:24:53,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-24 12:24:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2018-10-24 12:24:53,151 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 28 [2018-10-24 12:24:53,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:53,151 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2018-10-24 12:24:53,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 12:24:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2018-10-24 12:24:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-24 12:24:53,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:53,153 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:53,153 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:53,153 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:53,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1637712594, now seen corresponding path program 3 times [2018-10-24 12:24:53,154 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:53,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:53,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:24:53,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:53,155 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-10-24 12:24:53,216 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-24 12:24:53,216 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-24 12:24:53,217 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-24 12:24:53,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-24 12:24:53,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-24 12:24:53,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-24 12:24:53,218 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 3 states. [2018-10-24 12:24:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:24:53,292 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2018-10-24 12:24:53,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-24 12:24:53,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2018-10-24 12:24:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:24:53,293 INFO L225 Difference]: With dead ends: 56 [2018-10-24 12:24:53,293 INFO L226 Difference]: Without dead ends: 33 [2018-10-24 12:24:53,294 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 [2018-10-24 12:24:53,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-24 12:24:53,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-24 12:24:53,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-24 12:24:53,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-24 12:24:53,307 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 28 [2018-10-24 12:24:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:24:53,307 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-24 12:24:53,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-24 12:24:53,307 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-24 12:24:53,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-24 12:24:53,308 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:24:53,308 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:24:53,308 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:24:53,309 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:24:53,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1605254594, now seen corresponding path program 4 times [2018-10-24 12:24:53,309 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:24:53,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:53,310 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:24:53,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:24:53,311 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:24:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:53,936 WARN L179 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 35 [2018-10-24 12:24:54,523 WARN L179 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2018-10-24 12:24:58,868 WARN L179 SmtUtils]: Spent 2.15 s on a formula simplification that was a NOOP. DAG size: 50 [2018-10-24 12:24:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:24:59,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:59,115 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:24:59,115 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:24:59,115 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:24:59,116 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:24:59,116 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 12:24:59,123 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:24:59,123 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-24 12:24:59,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:24:59,173 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:24:59,206 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-10-24 12:24:59,223 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:24:59,224 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:24:59,306 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:24:59,311 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-10-24 12:24:59,314 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:24:59,314 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 12:24:59,323 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:25:01,385 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:25:01,385 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-10-24 12:25:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:02,053 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:25:02,184 WARN L179 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2018-10-24 12:25:02,941 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:02,962 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:25:02,962 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 30 [2018-10-24 12:25:02,962 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:25:02,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-24 12:25:02,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-24 12:25:02,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2018-10-24 12:25:02,965 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 22 states. [2018-10-24 12:25:03,697 WARN L179 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2018-10-24 12:25:04,149 WARN L179 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 74 [2018-10-24 12:25:04,369 WARN L179 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2018-10-24 12:25:06,162 WARN L179 SmtUtils]: Spent 952.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2018-10-24 12:25:06,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:25:06,806 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-24 12:25:06,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-24 12:25:06,807 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 32 [2018-10-24 12:25:06,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:25:06,808 INFO L225 Difference]: With dead ends: 48 [2018-10-24 12:25:06,808 INFO L226 Difference]: Without dead ends: 38 [2018-10-24 12:25:06,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=211, Invalid=1595, Unknown=0, NotChecked=0, Total=1806 [2018-10-24 12:25:06,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-24 12:25:06,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2018-10-24 12:25:06,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-24 12:25:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-24 12:25:06,817 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 32 [2018-10-24 12:25:06,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:25:06,817 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-24 12:25:06,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-24 12:25:06,818 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-24 12:25:06,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-24 12:25:06,819 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:25:06,819 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:25:06,819 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:25:06,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:25:06,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1810116584, now seen corresponding path program 5 times [2018-10-24 12:25:06,820 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:25:06,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:06,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-24 12:25:06,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:25:06,821 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:25:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:25:07,715 WARN L179 SmtUtils]: Spent 693.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 34 [2018-10-24 12:25:08,431 WARN L179 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2018-10-24 12:25:08,840 WARN L179 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 68 [2018-10-24 12:25:09,212 WARN L179 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 48 [2018-10-24 12:25:11,415 WARN L179 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2018-10-24 12:25:37,941 WARN L179 SmtUtils]: Spent 24.28 s on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2018-10-24 12:25:40,696 WARN L179 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2018-10-24 12:25:40,937 WARN L179 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 52 [2018-10-24 12:25:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:25:40,952 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:40,952 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:25:40,952 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:25:40,952 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:25:40,953 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:25:40,953 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 12:25:40,966 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-24 12:25:40,966 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2018-10-24 12:25:47,718 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-24 12:25:47,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:25:47,724 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:25:47,734 WARN L307 Elim1Store]: Array PQE input equivalent to false [2018-10-24 12:25:47,734 INFO L267 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2018-10-24 12:25:55,783 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 18 [2018-10-24 12:25:55,786 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:25:55,786 INFO L267 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2018-10-24 12:25:55,788 INFO L267 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:25:55,794 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:25:55,794 INFO L202 ElimStorePlain]: Needed 4 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-10-24 12:26:03,848 WARN L179 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2018-10-24 12:26:11,824 WARN L179 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2018-10-24 12:26:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:26:14,245 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:26:14,818 WARN L179 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 109 [2018-10-24 12:26:15,024 WARN L179 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2018-10-24 12:26:16,551 WARN L179 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-10-24 12:26:17,701 WARN L179 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2018-10-24 12:26:18,213 WARN L179 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2018-10-24 12:26:18,660 WARN L179 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2018-10-24 12:26:19,300 WARN L179 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2018-10-24 12:26:19,925 WARN L179 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2018-10-24 12:26:20,495 WARN L179 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2018-10-24 12:26:21,274 WARN L179 SmtUtils]: Spent 283.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2018-10-24 12:26:22,756 WARN L179 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2018-10-24 12:26:23,794 WARN L179 SmtUtils]: Spent 364.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2018-10-24 12:26:25,921 WARN L179 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2018-10-24 12:26:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:26:25,985 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:26:25,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 17] total 45 [2018-10-24 12:26:25,986 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:26:25,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-24 12:26:25,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-24 12:26:25,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1768, Unknown=8, NotChecked=0, Total=1980 [2018-10-24 12:26:25,987 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 30 states. [2018-10-24 12:26:34,229 WARN L179 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 79 [2018-10-24 12:26:43,628 WARN L179 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 131 DAG size of output: 67 [2018-10-24 12:26:43,854 WARN L179 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2018-10-24 12:26:46,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-24 12:26:46,379 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-24 12:26:46,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 12:26:46,386 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 36 [2018-10-24 12:26:46,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-24 12:26:46,387 INFO L225 Difference]: With dead ends: 52 [2018-10-24 12:26:46,387 INFO L226 Difference]: Without dead ends: 42 [2018-10-24 12:26:46,388 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 73.6s TimeCoverageRelationStatistics Valid=306, Invalid=2234, Unknown=10, NotChecked=0, Total=2550 [2018-10-24 12:26:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-24 12:26:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2018-10-24 12:26:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-24 12:26:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-24 12:26:46,399 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 36 [2018-10-24 12:26:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-24 12:26:46,400 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-24 12:26:46,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-24 12:26:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-24 12:26:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-24 12:26:46,401 INFO L367 BasicCegarLoop]: Found error trace [2018-10-24 12:26:46,401 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-24 12:26:46,401 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-24 12:26:46,407 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-24 12:26:46,408 INFO L82 PathProgramCache]: Analyzing trace with hash 668186770, now seen corresponding path program 6 times [2018-10-24 12:26:46,408 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-24 12:26:46,408 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:26:46,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-24 12:26:46,409 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-24 12:26:46,409 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-24 12:26:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-24 12:26:47,048 WARN L179 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 34 [2018-10-24 12:26:47,515 WARN L179 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 36 [2018-10-24 12:26:51,802 WARN L179 SmtUtils]: Spent 4.26 s on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2018-10-24 12:26:52,014 WARN L179 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2018-10-24 12:26:54,277 WARN L179 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2018-10-24 12:26:54,760 WARN L179 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2018-10-24 12:26:59,408 WARN L179 SmtUtils]: Spent 4.60 s on a formula simplification. DAG size of input: 105 DAG size of output: 70 [2018-10-24 12:26:59,649 WARN L179 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2018-10-24 12:27:00,973 WARN L179 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2018-10-24 12:27:01,341 WARN L179 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2018-10-24 12:27:03,587 WARN L179 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2018-10-24 12:27:30,756 WARN L179 SmtUtils]: Spent 18.40 s on a formula simplification. DAG size of input: 84 DAG size of output: 67 [2018-10-24 12:27:56,557 WARN L179 SmtUtils]: Spent 21.51 s on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2018-10-24 12:27:56,922 WARN L179 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 41 [2018-10-24 12:27:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 59 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:27:56,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:27:56,941 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-24 12:27:56,941 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-24 12:27:56,941 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-24 12:27:56,941 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-24 12:27:56,941 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 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 [2018-10-24 12:27:56,953 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-24 12:27:56,953 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-24 12:27:57,050 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-24 12:27:57,050 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-24 12:27:57,054 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-24 12:27:57,070 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 28 [2018-10-24 12:27:57,073 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:27:57,073 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-24 12:27:57,083 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:27:57,086 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 27 [2018-10-24 12:27:57,088 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2018-10-24 12:27:57,089 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-24 12:27:57,097 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:28:03,140 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-24 12:28:03,140 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:100, output treesize:21 [2018-10-24 12:28:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:28:05,172 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-24 12:28:05,530 WARN L179 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 98 [2018-10-24 12:28:07,901 WARN L179 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2018-10-24 12:28:10,165 WARN L179 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2018-10-24 12:28:13,789 WARN L179 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2018-10-24 12:28:14,622 WARN L179 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2018-10-24 12:28:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-24 12:28:14,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-24 12:28:14,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 50 [2018-10-24 12:28:14,793 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-24 12:28:14,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-24 12:28:14,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-24 12:28:14,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2250, Unknown=7, NotChecked=0, Total=2450 [2018-10-24 12:28:14,795 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 35 states. [2018-10-24 12:28:16,031 WARN L179 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2018-10-24 12:28:16,596 WARN L179 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2018-10-24 12:28:17,202 WARN L179 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2018-10-24 12:28:24,374 WARN L179 SmtUtils]: Spent 4.82 s on a formula simplification. DAG size of input: 129 DAG size of output: 98 [2018-10-24 12:28:24,833 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 92 [2018-10-24 12:28:32,059 WARN L179 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 97 [2018-10-24 12:28:36,551 WARN L179 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 55 [2018-10-24 12:28:36,943 WARN L179 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 48 [2018-10-24 12:28:37,643 WARN L179 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 57 [2018-10-24 12:28:39,927 WARN L179 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 158 DAG size of output: 48 Received shutdown request... [2018-10-24 12:28:56,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-24 12:28:56,861 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-24 12:28:56,865 WARN L205 ceAbstractionStarter]: Timeout [2018-10-24 12:28:56,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:28:56 BoogieIcfgContainer [2018-10-24 12:28:56,866 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-24 12:28:56,866 INFO L168 Benchmark]: Toolchain (without parser) took 274035.30 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 939.0 MB). Free memory was 1.4 GB in the beginning and 2.4 GB in the end (delta: -982.9 MB). Peak memory consumption was 781.9 MB. Max. memory is 7.1 GB. [2018-10-24 12:28:56,867 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:28:56,868 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.74 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-24 12:28:56,869 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.08 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:28:56,869 INFO L168 Benchmark]: Boogie Preprocessor took 36.96 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-24 12:28:56,869 INFO L168 Benchmark]: RCFGBuilder took 639.37 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 766.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -807.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2018-10-24 12:28:56,872 INFO L168 Benchmark]: TraceAbstraction took 273010.78 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 172.5 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -186.2 MB). Peak memory consumption was 812.2 MB. Max. memory is 7.1 GB. [2018-10-24 12:28:56,880 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 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 296.74 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 44.08 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 36.96 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 639.37 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 766.5 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -807.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 273010.78 ms. Allocated memory was 2.3 GB in the beginning and 2.5 GB in the end (delta: 172.5 MB). Free memory was 2.2 GB in the beginning and 2.4 GB in the end (delta: -186.2 MB). Peak memory consumption was 812.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 5]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 5). Cancelled while BasicCegarLoop was constructing difference of abstraction (41states) and FLOYD_HOARE automaton (currently 19 states, 35 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 66 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. TIMEOUT Result, 272.9s OverallTime, 11 OverallIterations, 6 TraceHistogramMax, 74.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 212 SDtfs, 321 SDslu, 1382 SDs, 0 SdLazy, 1934 SolverSat, 119 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 14.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 601 GetRequests, 298 SyntacticMatches, 21 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 206.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.8s AbstIntTime, 2 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 46 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 7.4s SatisfiabilityAnalysisTime, 188.9s InterpolantComputationTime, 509 NumberOfCodeBlocks, 501 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 696 ConstructedInterpolants, 148 QuantifiedInterpolants, 1128760 SizeOfPredicates, 143 NumberOfNonLiveVariables, 1029 ConjunctsInSsa, 334 ConjunctsInUnsatCore, 25 InterpolantComputations, 4 PerfectInterpolantSequences, 28/480 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown