java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call1_true-termination.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-b6335f6 [2018-10-23 10:00:23,030 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-23 10:00:23,034 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-23 10:00:23,050 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-23 10:00:23,050 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-23 10:00:23,051 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-23 10:00:23,053 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-23 10:00:23,055 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-23 10:00:23,057 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-23 10:00:23,058 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-23 10:00:23,066 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-23 10:00:23,066 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-23 10:00:23,068 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-23 10:00:23,069 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-23 10:00:23,070 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-23 10:00:23,070 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-23 10:00:23,071 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-23 10:00:23,073 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-23 10:00:23,075 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-23 10:00:23,076 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-23 10:00:23,077 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-23 10:00:23,078 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-23 10:00:23,080 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-23 10:00:23,088 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-64bit-Taipan_Default.epf [2018-10-23 10:00:23,104 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-23 10:00:23,105 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-23 10:00:23,105 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-23 10:00:23,106 INFO L133 SettingsManager]: * User list type=DISABLED [2018-10-23 10:00:23,106 INFO L133 SettingsManager]: * calls to implemented procedures=false [2018-10-23 10:00:23,106 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-10-23 10:00:23,106 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-10-23 10:00:23,106 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-10-23 10:00:23,107 INFO L133 SettingsManager]: * Log string format=TERM [2018-10-23 10:00:23,107 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-10-23 10:00:23,107 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-10-23 10:00:23,107 INFO L133 SettingsManager]: * Interval Domain=false [2018-10-23 10:00:23,108 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-23 10:00:23,108 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-23 10:00:23,108 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-23 10:00:23,108 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-23 10:00:23,109 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-23 10:00:23,109 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-23 10:00:23,109 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-23 10:00:23,109 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-23 10:00:23,109 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-23 10:00:23,110 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-23 10:00:23,110 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-23 10:00:23,110 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-23 10:00:23,110 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 10:00:23,111 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-23 10:00:23,111 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-23 10:00:23,111 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-23 10:00:23,111 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-10-23 10:00:23,111 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-23 10:00:23,111 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-23 10:00:23,112 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-23 10:00:23,112 INFO L133 SettingsManager]: * To the following directory=dump/ [2018-10-23 10:00:23,112 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2018-10-23 10:00:23,160 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-23 10:00:23,176 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-23 10:00:23,180 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-23 10:00:23,182 INFO L271 PluginConnector]: Initializing CDTParser... [2018-10-23 10:00:23,182 INFO L276 PluginConnector]: CDTParser initialized [2018-10-23 10:00:23,183 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call1_true-termination.i [2018-10-23 10:00:23,257 INFO L218 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8d77659af/76f0b140b4e040b882d4ca691603667a/FLAG1ea210f5d [2018-10-23 10:00:23,721 INFO L298 CDTParser]: Found 1 translation units. [2018-10-23 10:00:23,722 INFO L158 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_true-unreach-call1_true-termination.i [2018-10-23 10:00:23,729 INFO L346 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8d77659af/76f0b140b4e040b882d4ca691603667a/FLAG1ea210f5d [2018-10-23 10:00:23,749 INFO L354 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/data/8d77659af/76f0b140b4e040b882d4ca691603667a [2018-10-23 10:00:23,760 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-23 10:00:23,762 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2018-10-23 10:00:23,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-10-23 10:00:23,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-10-23 10:00:23,767 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-10-23 10:00:23,770 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:00:23" (1/1) ... [2018-10-23 10:00:23,773 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d555d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:23, skipping insertion in model container [2018-10-23 10:00:23,773 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:00:23" (1/1) ... [2018-10-23 10:00:23,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-10-23 10:00:23,807 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-10-23 10:00:24,030 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 10:00:24,034 INFO L189 MainTranslator]: Completed pre-run [2018-10-23 10:00:24,057 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-10-23 10:00:24,079 INFO L193 MainTranslator]: Completed translation [2018-10-23 10:00:24,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:24 WrapperNode [2018-10-23 10:00:24,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-10-23 10:00:24,081 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-23 10:00:24,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-23 10:00:24,081 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-23 10:00:24,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:24" (1/1) ... [2018-10-23 10:00:24,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:24" (1/1) ... [2018-10-23 10:00:24,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-23 10:00:24,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-23 10:00:24,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-23 10:00:24,124 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-23 10:00:24,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:24" (1/1) ... [2018-10-23 10:00:24,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:24" (1/1) ... [2018-10-23 10:00:24,140 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:24" (1/1) ... [2018-10-23 10:00:24,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:24" (1/1) ... [2018-10-23 10:00:24,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:24" (1/1) ... [2018-10-23 10:00:24,159 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:24" (1/1) ... [2018-10-23 10:00:24,161 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:24" (1/1) ... [2018-10-23 10:00:24,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-23 10:00:24,163 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-23 10:00:24,163 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-23 10:00:24,163 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-23 10:00:24,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-23 10:00:24,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-10-23 10:00:24,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-10-23 10:00:24,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-23 10:00:24,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-23 10:00:24,290 INFO L130 BoogieDeclarations]: Found specification of procedure main [2018-10-23 10:00:24,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2018-10-23 10:00:24,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2018-10-23 10:00:24,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2018-10-23 10:00:24,799 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-23 10:00:24,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:00:24 BoogieIcfgContainer [2018-10-23 10:00:24,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-23 10:00:24,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-23 10:00:24,801 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-23 10:00:24,804 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-23 10:00:24,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:00:23" (1/3) ... [2018-10-23 10:00:24,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47063f2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:00:24, skipping insertion in model container [2018-10-23 10:00:24,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:24" (2/3) ... [2018-10-23 10:00:24,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47063f2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:00:24, skipping insertion in model container [2018-10-23 10:00:24,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:00:24" (3/3) ... [2018-10-23 10:00:24,808 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_true-unreach-call1_true-termination.i [2018-10-23 10:00:24,818 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-23 10:00:24,827 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-23 10:00:24,844 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-10-23 10:00:24,876 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-10-23 10:00:24,877 INFO L383 AbstractCegarLoop]: Hoare is true [2018-10-23 10:00:24,877 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-23 10:00:24,877 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-23 10:00:24,877 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-23 10:00:24,877 INFO L387 AbstractCegarLoop]: Difference is false [2018-10-23 10:00:24,877 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-23 10:00:24,878 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-23 10:00:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2018-10-23 10:00:24,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-23 10:00:24,901 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:24,902 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:24,904 INFO L424 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:24,910 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:24,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1504457121, now seen corresponding path program 1 times [2018-10-23 10:00:24,914 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:24,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:24,971 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:24,971 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:24,971 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:25,060 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 10:00:25,060 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-23 10:00:25,061 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 10:00:25,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2018-10-23 10:00:25,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2018-10-23 10:00:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 10:00:25,080 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2018-10-23 10:00:25,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:25,103 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2018-10-23 10:00:25,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-10-23 10:00:25,104 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2018-10-23 10:00:25,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:25,114 INFO L225 Difference]: With dead ends: 49 [2018-10-23 10:00:25,114 INFO L226 Difference]: Without dead ends: 24 [2018-10-23 10:00:25,118 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-10-23 10:00:25,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-23 10:00:25,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-23 10:00:25,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-23 10:00:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2018-10-23 10:00:25,172 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2018-10-23 10:00:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:25,173 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2018-10-23 10:00:25,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2018-10-23 10:00:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2018-10-23 10:00:25,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-23 10:00:25,176 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:25,178 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:25,179 INFO L424 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:25,179 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:25,179 INFO L82 PathProgramCache]: Analyzing trace with hash -194164888, now seen corresponding path program 1 times [2018-10-23 10:00:25,179 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:25,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:25,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:25,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:25,187 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:25,403 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-23 10:00:25,403 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-23 10:00:25,403 INFO L258 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-10-23 10:00:25,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-23 10:00:25,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-23 10:00:25,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 10:00:25,409 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 3 states. [2018-10-23 10:00:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:25,548 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2018-10-23 10:00:25,548 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-23 10:00:25,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2018-10-23 10:00:25,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:25,549 INFO L225 Difference]: With dead ends: 48 [2018-10-23 10:00:25,550 INFO L226 Difference]: Without dead ends: 33 [2018-10-23 10:00:25,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-23 10:00:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-23 10:00:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2018-10-23 10:00:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-23 10:00:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2018-10-23 10:00:25,563 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 16 [2018-10-23 10:00:25,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:25,563 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2018-10-23 10:00:25,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-23 10:00:25,564 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2018-10-23 10:00:25,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-23 10:00:25,564 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:25,565 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:25,565 INFO L424 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:25,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:25,565 INFO L82 PathProgramCache]: Analyzing trace with hash 706658557, now seen corresponding path program 1 times [2018-10-23 10:00:25,565 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:25,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:25,567 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:25,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:25,567 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:25,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:25,706 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:25,706 INFO L200 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2018-10-23 10:00:25,708 INFO L202 CegarAbsIntRunner]: [0], [1], [5], [9], [12], [14], [16], [20], [24], [29], [32], [46], [49], [51], [57], [58], [59], [61] [2018-10-23 10:00:25,755 INFO L148 AbstractInterpreter]: Using domain PoormanAbstractDomain with backing domain CompoundDomain [CongruenceDomain, OctagonDomain] [2018-10-23 10:00:25,756 INFO L101 FixpointEngine]: Starting fixpoint engine with domain PoormanAbstractDomain (maxUnwinding=3, maxParallelStates=2) [2018-10-23 10:00:25,936 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2018-10-23 10:00:27,428 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2018-10-23 10:00:27,430 INFO L272 AbstractInterpreter]: Visited 18 different actions 166 times. Merged at 4 different actions 118 times. Widened at 1 different actions 26 times. Found 29 fixpoints after 2 different actions. Largest state had 29 variables. [2018-10-23 10:00:27,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:27,474 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2018-10-23 10:00:27,475 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:27,475 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:00:27,497 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:27,498 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:00:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:27,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:27,709 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 11 treesize of output 8 [2018-10-23 10:00:27,728 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 8 treesize of output 7 [2018-10-23 10:00:27,729 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-23 10:00:27,754 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 10:00:27,778 INFO L267 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-23 10:00:27,778 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2018-10-23 10:00:28,077 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 11 [2018-10-23 10:00:28,092 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 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 11 treesize of output 3 [2018-10-23 10:00:28,093 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-23 10:00:28,118 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 10:00:28,144 INFO L267 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-23 10:00:28,145 INFO L202 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2018-10-23 10:00:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:28,625 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:00:29,358 WARN L179 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2018-10-23 10:00:29,462 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 26 treesize of output 24 [2018-10-23 10:00:29,501 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 7 treesize of output 5 [2018-10-23 10:00:29,503 INFO L267 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2018-10-23 10:00:29,529 INFO L267 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 10:00:29,533 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 25 [2018-10-23 10:00:29,602 INFO L477 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 7 treesize of output 5 [2018-10-23 10:00:29,603 INFO L267 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2018-10-23 10:00:29,640 INFO L267 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2018-10-23 10:00:29,659 INFO L267 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2018-10-23 10:00:29,659 INFO L202 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:88, output treesize:7 [2018-10-23 10:00:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:29,755 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:00:29,755 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 15 [2018-10-23 10:00:29,755 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:00:29,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 10:00:29,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 10:00:29,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2018-10-23 10:00:29,758 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2018-10-23 10:00:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:36,337 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2018-10-23 10:00:36,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 10:00:36,338 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2018-10-23 10:00:36,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:36,340 INFO L225 Difference]: With dead ends: 87 [2018-10-23 10:00:36,340 INFO L226 Difference]: Without dead ends: 69 [2018-10-23 10:00:36,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2018-10-23 10:00:36,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-23 10:00:36,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2018-10-23 10:00:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-23 10:00:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2018-10-23 10:00:36,353 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 19 [2018-10-23 10:00:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:36,353 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2018-10-23 10:00:36,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 10:00:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2018-10-23 10:00:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-23 10:00:36,355 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:36,355 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:36,355 INFO L424 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:36,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:36,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1962567395, now seen corresponding path program 2 times [2018-10-23 10:00:36,356 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:36,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:36,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:36,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:36,357 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:36,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:36,562 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:36,562 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:36,563 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:00:36,563 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:00:36,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:36,563 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UTaipan-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:00:36,582 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:00:36,582 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:00:36,618 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:00:36,618 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:00:36,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:36,684 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:00:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:36,998 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:00:36,998 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2018-10-23 10:00:36,998 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:00:36,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-23 10:00:36,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-23 10:00:36,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-23 10:00:36,999 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand 6 states. [2018-10-23 10:00:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:37,202 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2018-10-23 10:00:37,205 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-23 10:00:37,205 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-10-23 10:00:37,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:37,206 INFO L225 Difference]: With dead ends: 93 [2018-10-23 10:00:37,207 INFO L226 Difference]: Without dead ends: 60 [2018-10-23 10:00:37,207 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-10-23 10:00:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-23 10:00:37,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2018-10-23 10:00:37,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-23 10:00:37,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2018-10-23 10:00:37,217 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 25 [2018-10-23 10:00:37,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:37,217 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2018-10-23 10:00:37,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-23 10:00:37,218 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2018-10-23 10:00:37,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-23 10:00:37,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:37,219 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:37,219 INFO L424 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:37,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:37,220 INFO L82 PathProgramCache]: Analyzing trace with hash 296425256, now seen corresponding path program 3 times [2018-10-23 10:00:37,220 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:37,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:37,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:00:37,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:37,221 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:37,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:37,403 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:37,403 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:37,403 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:00:37,403 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:00:37,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:37,404 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 [2018-10-23 10:00:37,414 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 10:00:37,414 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 10:00:37,459 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 10:00:37,459 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:00:37,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:37,488 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:00:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:37,734 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:00:37,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2018-10-23 10:00:37,735 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:00:37,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-23 10:00:37,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-23 10:00:37,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-10-23 10:00:37,736 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 7 states. [2018-10-23 10:00:38,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:38,040 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2018-10-23 10:00:38,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-23 10:00:38,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2018-10-23 10:00:38,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:38,042 INFO L225 Difference]: With dead ends: 105 [2018-10-23 10:00:38,043 INFO L226 Difference]: Without dead ends: 69 [2018-10-23 10:00:38,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2018-10-23 10:00:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-23 10:00:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2018-10-23 10:00:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-23 10:00:38,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2018-10-23 10:00:38,065 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 28 [2018-10-23 10:00:38,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:38,066 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2018-10-23 10:00:38,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-23 10:00:38,066 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2018-10-23 10:00:38,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-23 10:00:38,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:38,069 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:38,069 INFO L424 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:38,070 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:38,070 INFO L82 PathProgramCache]: Analyzing trace with hash 103930173, now seen corresponding path program 4 times [2018-10-23 10:00:38,070 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:38,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:38,072 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:00:38,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:38,073 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:38,532 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:38,532 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:38,532 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:38,533 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:00:38,533 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:00:38,533 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:38,533 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) [2018-10-23 10:00:38,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:38,548 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:00:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:38,581 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:38,661 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:00:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:39,412 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:00:39,412 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2018-10-23 10:00:39,412 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:00:39,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-23 10:00:39,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-23 10:00:39,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-10-23 10:00:39,413 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand 8 states. [2018-10-23 10:00:39,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:39,652 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2018-10-23 10:00:39,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-23 10:00:39,654 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2018-10-23 10:00:39,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:39,656 INFO L225 Difference]: With dead ends: 120 [2018-10-23 10:00:39,656 INFO L226 Difference]: Without dead ends: 78 [2018-10-23 10:00:39,657 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2018-10-23 10:00:39,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-10-23 10:00:39,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2018-10-23 10:00:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2018-10-23 10:00:39,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2018-10-23 10:00:39,667 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 31 [2018-10-23 10:00:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:39,667 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2018-10-23 10:00:39,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-23 10:00:39,667 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2018-10-23 10:00:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-23 10:00:39,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:39,668 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:39,669 INFO L424 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:39,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:39,669 INFO L82 PathProgramCache]: Analyzing trace with hash -735747320, now seen corresponding path program 5 times [2018-10-23 10:00:39,669 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:39,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:39,670 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:39,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:39,670 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:39,893 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:39,893 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:39,893 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:00:39,894 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:00:39,894 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:39,894 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 [2018-10-23 10:00:39,902 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:00:39,903 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:00:39,940 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:00:39,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:00:39,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:39,960 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:00:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:42,253 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:00:42,253 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2018-10-23 10:00:42,253 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:00:42,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-23 10:00:42,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-23 10:00:42,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2018-10-23 10:00:42,254 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 9 states. [2018-10-23 10:00:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:42,705 INFO L93 Difference]: Finished difference Result 135 states and 154 transitions. [2018-10-23 10:00:42,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-23 10:00:42,706 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2018-10-23 10:00:42,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:42,708 INFO L225 Difference]: With dead ends: 135 [2018-10-23 10:00:42,708 INFO L226 Difference]: Without dead ends: 87 [2018-10-23 10:00:42,709 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2018-10-23 10:00:42,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-23 10:00:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2018-10-23 10:00:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-10-23 10:00:42,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2018-10-23 10:00:42,719 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 34 [2018-10-23 10:00:42,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:42,720 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2018-10-23 10:00:42,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-23 10:00:42,720 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2018-10-23 10:00:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-23 10:00:42,721 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:42,721 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:42,721 INFO L424 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:42,722 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:42,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1678409379, now seen corresponding path program 6 times [2018-10-23 10:00:42,723 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:42,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:42,724 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:00:42,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:42,724 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:42,945 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:42,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:42,945 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:42,945 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:00:42,945 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:00:42,945 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:42,946 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 [2018-10-23 10:00:42,956 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 10:00:42,957 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 10:00:43,011 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 10:00:43,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:00:43,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:43,166 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:00:45,347 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:45,367 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:00:45,368 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2018-10-23 10:00:45,368 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:00:45,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-23 10:00:45,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-23 10:00:45,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-10-23 10:00:45,369 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand 10 states. [2018-10-23 10:00:45,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:45,852 INFO L93 Difference]: Finished difference Result 150 states and 171 transitions. [2018-10-23 10:00:45,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-23 10:00:45,855 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2018-10-23 10:00:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:45,857 INFO L225 Difference]: With dead ends: 150 [2018-10-23 10:00:45,857 INFO L226 Difference]: Without dead ends: 96 [2018-10-23 10:00:45,858 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-10-23 10:00:45,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-23 10:00:45,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2018-10-23 10:00:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-10-23 10:00:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2018-10-23 10:00:45,870 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 37 [2018-10-23 10:00:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:45,871 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2018-10-23 10:00:45,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-23 10:00:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2018-10-23 10:00:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-23 10:00:45,872 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:45,872 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:45,873 INFO L424 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:45,873 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:45,873 INFO L82 PathProgramCache]: Analyzing trace with hash 267339496, now seen corresponding path program 7 times [2018-10-23 10:00:45,873 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:45,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:45,874 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:00:45,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:45,874 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:46,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:46,193 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:46,193 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:00:46,193 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:00:46,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:46,193 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 [2018-10-23 10:00:46,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:46,202 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:00:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:46,245 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:46,302 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:00:50,675 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:50,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:00:50,696 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2018-10-23 10:00:50,696 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:00:50,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-23 10:00:50,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-23 10:00:50,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=261, Unknown=1, NotChecked=0, Total=380 [2018-10-23 10:00:50,697 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand 11 states. [2018-10-23 10:00:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:51,242 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2018-10-23 10:00:51,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-23 10:00:51,243 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2018-10-23 10:00:51,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:51,244 INFO L225 Difference]: With dead ends: 165 [2018-10-23 10:00:51,244 INFO L226 Difference]: Without dead ends: 105 [2018-10-23 10:00:51,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=118, Invalid=261, Unknown=1, NotChecked=0, Total=380 [2018-10-23 10:00:51,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2018-10-23 10:00:51,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2018-10-23 10:00:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-23 10:00:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2018-10-23 10:00:51,255 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 40 [2018-10-23 10:00:51,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:51,256 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2018-10-23 10:00:51,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-23 10:00:51,256 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2018-10-23 10:00:51,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-23 10:00:51,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:51,257 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:51,258 INFO L424 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:51,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:51,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1193447805, now seen corresponding path program 8 times [2018-10-23 10:00:51,258 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:51,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:51,259 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:00:51,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:51,259 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:51,498 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:51,498 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:51,499 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:00:51,499 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:00:51,499 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:51,499 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:00:51,509 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:00:51,509 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:00:51,546 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:00:51,547 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:00:51,550 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:51,573 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:00:56,792 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:56,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:00:56,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2018-10-23 10:00:56,813 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:00:56,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-23 10:00:56,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-23 10:00:56,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=320, Unknown=1, NotChecked=0, Total=462 [2018-10-23 10:00:56,814 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand 12 states. [2018-10-23 10:00:57,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:00:57,499 INFO L93 Difference]: Finished difference Result 180 states and 205 transitions. [2018-10-23 10:00:57,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-23 10:00:57,500 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2018-10-23 10:00:57,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:00:57,502 INFO L225 Difference]: With dead ends: 180 [2018-10-23 10:00:57,502 INFO L226 Difference]: Without dead ends: 114 [2018-10-23 10:00:57,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=141, Invalid=320, Unknown=1, NotChecked=0, Total=462 [2018-10-23 10:00:57,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2018-10-23 10:00:57,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2018-10-23 10:00:57,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2018-10-23 10:00:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2018-10-23 10:00:57,515 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 43 [2018-10-23 10:00:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:00:57,515 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2018-10-23 10:00:57,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-23 10:00:57,516 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2018-10-23 10:00:57,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-23 10:00:57,517 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:00:57,517 INFO L375 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:00:57,517 INFO L424 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:00:57,518 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:00:57,518 INFO L82 PathProgramCache]: Analyzing trace with hash 16171720, now seen corresponding path program 9 times [2018-10-23 10:00:57,518 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:00:57,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:57,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:00:57,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:00:57,519 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:00:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:00:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:58,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:58,134 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:00:58,134 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:00:58,134 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:00:58,134 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:00:58,135 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:00:58,148 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 10:00:58,148 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 10:00:58,194 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 10:00:58,195 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:00:58,198 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:00:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:00:58,225 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:01:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:05,436 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:01:05,436 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2018-10-23 10:01:05,436 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:01:05,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-23 10:01:05,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-23 10:01:05,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=385, Unknown=1, NotChecked=0, Total=552 [2018-10-23 10:01:05,438 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand 13 states. [2018-10-23 10:01:06,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:01:06,690 INFO L93 Difference]: Finished difference Result 195 states and 222 transitions. [2018-10-23 10:01:06,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-23 10:01:06,691 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2018-10-23 10:01:06,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:01:06,693 INFO L225 Difference]: With dead ends: 195 [2018-10-23 10:01:06,693 INFO L226 Difference]: Without dead ends: 123 [2018-10-23 10:01:06,694 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=166, Invalid=385, Unknown=1, NotChecked=0, Total=552 [2018-10-23 10:01:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-10-23 10:01:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2018-10-23 10:01:06,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-23 10:01:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 132 transitions. [2018-10-23 10:01:06,706 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 132 transitions. Word has length 46 [2018-10-23 10:01:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:01:06,707 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 132 transitions. [2018-10-23 10:01:06,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-23 10:01:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 132 transitions. [2018-10-23 10:01:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-23 10:01:06,708 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:01:06,708 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:01:06,709 INFO L424 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:01:06,709 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:01:06,709 INFO L82 PathProgramCache]: Analyzing trace with hash 487262621, now seen corresponding path program 10 times [2018-10-23 10:01:06,709 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:01:06,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:01:06,710 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:01:06,710 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:01:06,710 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:01:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:01:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:07,084 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:01:07,084 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:01:07,084 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:01:07,085 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:01:07,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:01:07,085 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:01:07,096 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:01:07,096 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:01:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:01:07,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:01:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:07,185 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:01:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 184 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:18,577 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:01:18,577 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2018-10-23 10:01:18,577 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:01:18,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-23 10:01:18,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-23 10:01:18,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=454, Unknown=3, NotChecked=0, Total=650 [2018-10-23 10:01:18,578 INFO L87 Difference]: Start difference. First operand 119 states and 132 transitions. Second operand 14 states. [2018-10-23 10:01:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:01:19,285 INFO L93 Difference]: Finished difference Result 210 states and 239 transitions. [2018-10-23 10:01:19,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-23 10:01:19,287 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2018-10-23 10:01:19,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:01:19,289 INFO L225 Difference]: With dead ends: 210 [2018-10-23 10:01:19,289 INFO L226 Difference]: Without dead ends: 132 [2018-10-23 10:01:19,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=193, Invalid=454, Unknown=3, NotChecked=0, Total=650 [2018-10-23 10:01:19,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2018-10-23 10:01:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2018-10-23 10:01:19,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-10-23 10:01:19,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2018-10-23 10:01:19,298 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 49 [2018-10-23 10:01:19,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:01:19,298 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2018-10-23 10:01:19,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-23 10:01:19,298 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2018-10-23 10:01:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-23 10:01:19,299 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:01:19,299 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:01:19,300 INFO L424 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:01:19,300 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:01:19,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1196829016, now seen corresponding path program 11 times [2018-10-23 10:01:19,300 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:01:19,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:01:19,301 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:01:19,301 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:01:19,301 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:01:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:01:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:19,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:01:19,935 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:01:19,935 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:01:19,935 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:01:19,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:01:19,935 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:01:19,944 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:01:19,944 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:01:19,999 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:01:19,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:01:20,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:01:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:20,133 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:01:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:29,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:01:29,462 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2018-10-23 10:01:29,462 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:01:29,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-23 10:01:29,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-23 10:01:29,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=533, Unknown=1, NotChecked=0, Total=756 [2018-10-23 10:01:29,463 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand 15 states. [2018-10-23 10:01:30,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:01:30,448 INFO L93 Difference]: Finished difference Result 225 states and 256 transitions. [2018-10-23 10:01:30,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-23 10:01:30,448 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 52 [2018-10-23 10:01:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:01:30,450 INFO L225 Difference]: With dead ends: 225 [2018-10-23 10:01:30,450 INFO L226 Difference]: Without dead ends: 141 [2018-10-23 10:01:30,451 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=222, Invalid=533, Unknown=1, NotChecked=0, Total=756 [2018-10-23 10:01:30,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2018-10-23 10:01:30,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2018-10-23 10:01:30,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2018-10-23 10:01:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 152 transitions. [2018-10-23 10:01:30,461 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 152 transitions. Word has length 52 [2018-10-23 10:01:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:01:30,461 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 152 transitions. [2018-10-23 10:01:30,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-23 10:01:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 152 transitions. [2018-10-23 10:01:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-23 10:01:30,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:01:30,463 INFO L375 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:01:30,463 INFO L424 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:01:30,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:01:30,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1837164989, now seen corresponding path program 12 times [2018-10-23 10:01:30,464 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:01:30,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:01:30,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:01:30,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:01:30,465 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:01:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:01:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:30,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:01:30,740 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:01:30,740 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:01:30,740 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:01:30,740 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:01:30,740 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:01:30,748 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 10:01:30,748 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 10:01:30,795 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 10:01:30,795 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:01:30,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:01:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:30,862 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:01:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:40,781 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:01:40,782 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2018-10-23 10:01:40,782 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:01:40,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-23 10:01:40,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-23 10:01:40,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=616, Unknown=1, NotChecked=0, Total=870 [2018-10-23 10:01:40,783 INFO L87 Difference]: Start difference. First operand 137 states and 152 transitions. Second operand 16 states. [2018-10-23 10:01:41,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:01:41,732 INFO L93 Difference]: Finished difference Result 240 states and 273 transitions. [2018-10-23 10:01:41,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-23 10:01:41,734 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2018-10-23 10:01:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:01:41,735 INFO L225 Difference]: With dead ends: 240 [2018-10-23 10:01:41,735 INFO L226 Difference]: Without dead ends: 150 [2018-10-23 10:01:41,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=253, Invalid=616, Unknown=1, NotChecked=0, Total=870 [2018-10-23 10:01:41,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2018-10-23 10:01:41,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2018-10-23 10:01:41,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2018-10-23 10:01:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 162 transitions. [2018-10-23 10:01:41,744 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 162 transitions. Word has length 55 [2018-10-23 10:01:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:01:41,744 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 162 transitions. [2018-10-23 10:01:41,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-23 10:01:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 162 transitions. [2018-10-23 10:01:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-23 10:01:41,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:01:41,745 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:01:41,746 INFO L424 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:01:41,746 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:01:41,746 INFO L82 PathProgramCache]: Analyzing trace with hash -34176376, now seen corresponding path program 13 times [2018-10-23 10:01:41,746 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:01:41,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:01:41,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:01:41,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:01:41,747 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:01:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:01:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:42,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:01:42,579 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:01:42,580 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:01:42,580 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:01:42,580 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:01:42,580 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:01:42,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:01:42,587 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:01:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:01:42,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:01:42,659 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:42,659 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:01:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 298 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:55,086 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:01:55,087 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2018-10-23 10:01:55,087 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:01:55,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-23 10:01:55,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-23 10:01:55,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=704, Unknown=2, NotChecked=0, Total=992 [2018-10-23 10:01:55,088 INFO L87 Difference]: Start difference. First operand 146 states and 162 transitions. Second operand 17 states. [2018-10-23 10:01:56,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:01:56,633 INFO L93 Difference]: Finished difference Result 255 states and 290 transitions. [2018-10-23 10:01:56,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-23 10:01:56,634 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2018-10-23 10:01:56,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:01:56,636 INFO L225 Difference]: With dead ends: 255 [2018-10-23 10:01:56,636 INFO L226 Difference]: Without dead ends: 159 [2018-10-23 10:01:56,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=286, Invalid=704, Unknown=2, NotChecked=0, Total=992 [2018-10-23 10:01:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2018-10-23 10:01:56,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 155. [2018-10-23 10:01:56,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2018-10-23 10:01:56,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 172 transitions. [2018-10-23 10:01:56,646 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 172 transitions. Word has length 58 [2018-10-23 10:01:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:01:56,646 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 172 transitions. [2018-10-23 10:01:56,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-23 10:01:56,646 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 172 transitions. [2018-10-23 10:01:56,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-23 10:01:56,647 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:01:56,647 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:01:56,647 INFO L424 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:01:56,648 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:01:56,648 INFO L82 PathProgramCache]: Analyzing trace with hash -489279011, now seen corresponding path program 14 times [2018-10-23 10:01:56,648 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:01:56,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:01:56,649 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:01:56,649 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:01:56,649 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:01:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:01:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:56,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:01:56,963 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:01:56,963 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:01:56,963 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:01:56,963 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:01:56,963 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:01:56,970 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:01:56,971 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:01:57,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:01:57,022 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:01:57,024 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:01:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:01:57,076 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:02:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 342 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:02:08,704 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:02:08,704 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2018-10-23 10:02:08,704 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:02:08,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-23 10:02:08,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-23 10:02:08,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=800, Unknown=1, NotChecked=0, Total=1122 [2018-10-23 10:02:08,705 INFO L87 Difference]: Start difference. First operand 155 states and 172 transitions. Second operand 18 states. [2018-10-23 10:02:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:02:09,967 INFO L93 Difference]: Finished difference Result 270 states and 307 transitions. [2018-10-23 10:02:09,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-23 10:02:09,968 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2018-10-23 10:02:09,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:02:09,970 INFO L225 Difference]: With dead ends: 270 [2018-10-23 10:02:09,970 INFO L226 Difference]: Without dead ends: 168 [2018-10-23 10:02:09,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=321, Invalid=800, Unknown=1, NotChecked=0, Total=1122 [2018-10-23 10:02:09,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-10-23 10:02:09,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2018-10-23 10:02:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-23 10:02:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 182 transitions. [2018-10-23 10:02:09,980 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 182 transitions. Word has length 61 [2018-10-23 10:02:09,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:02:09,980 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 182 transitions. [2018-10-23 10:02:09,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-23 10:02:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 182 transitions. [2018-10-23 10:02:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-23 10:02:09,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:02:09,982 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:02:09,982 INFO L424 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:02:09,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:02:09,982 INFO L82 PathProgramCache]: Analyzing trace with hash 759875176, now seen corresponding path program 15 times [2018-10-23 10:02:09,982 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:02:09,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:02:09,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:02:09,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:02:09,983 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:02:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:02:10,403 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:02:10,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:02:10,404 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:02:10,404 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:02:10,404 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:02:10,404 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:02:10,404 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:02:10,413 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 10:02:10,413 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 10:02:10,475 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 10:02:10,476 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:02:10,478 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:02:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:02:10,518 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:02:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:02:22,832 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:02:22,832 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2018-10-23 10:02:22,832 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:02:22,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-23 10:02:22,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-23 10:02:22,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=901, Unknown=1, NotChecked=0, Total=1260 [2018-10-23 10:02:22,834 INFO L87 Difference]: Start difference. First operand 164 states and 182 transitions. Second operand 19 states. [2018-10-23 10:02:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:02:24,368 INFO L93 Difference]: Finished difference Result 285 states and 324 transitions. [2018-10-23 10:02:24,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-23 10:02:24,371 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2018-10-23 10:02:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:02:24,373 INFO L225 Difference]: With dead ends: 285 [2018-10-23 10:02:24,373 INFO L226 Difference]: Without dead ends: 177 [2018-10-23 10:02:24,374 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=358, Invalid=901, Unknown=1, NotChecked=0, Total=1260 [2018-10-23 10:02:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2018-10-23 10:02:24,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 173. [2018-10-23 10:02:24,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-23 10:02:24,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 192 transitions. [2018-10-23 10:02:24,384 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 192 transitions. Word has length 64 [2018-10-23 10:02:24,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:02:24,384 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 192 transitions. [2018-10-23 10:02:24,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-23 10:02:24,384 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 192 transitions. [2018-10-23 10:02:24,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-23 10:02:24,385 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:02:24,385 INFO L375 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:02:24,385 INFO L424 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:02:24,386 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:02:24,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1579359747, now seen corresponding path program 16 times [2018-10-23 10:02:24,386 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:02:24,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:02:24,387 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:02:24,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:02:24,387 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:02:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:02:24,752 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:02:24,752 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:02:24,752 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:02:24,752 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:02:24,752 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:02:24,753 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:02:24,753 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:02:24,761 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:02:24,761 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:02:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:02:24,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:02:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:02:24,873 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:02:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 439 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:02:46,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:02:46,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 38 [2018-10-23 10:02:46,166 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:02:46,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-23 10:02:46,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-23 10:02:46,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1006, Unknown=3, NotChecked=0, Total=1406 [2018-10-23 10:02:46,168 INFO L87 Difference]: Start difference. First operand 173 states and 192 transitions. Second operand 20 states. [2018-10-23 10:02:47,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:02:47,762 INFO L93 Difference]: Finished difference Result 300 states and 341 transitions. [2018-10-23 10:02:47,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-23 10:02:47,771 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2018-10-23 10:02:47,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:02:47,772 INFO L225 Difference]: With dead ends: 300 [2018-10-23 10:02:47,772 INFO L226 Difference]: Without dead ends: 186 [2018-10-23 10:02:47,774 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.5s TimeCoverageRelationStatistics Valid=397, Invalid=1006, Unknown=3, NotChecked=0, Total=1406 [2018-10-23 10:02:47,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2018-10-23 10:02:47,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2018-10-23 10:02:47,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-23 10:02:47,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 202 transitions. [2018-10-23 10:02:47,783 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 202 transitions. Word has length 67 [2018-10-23 10:02:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:02:47,783 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 202 transitions. [2018-10-23 10:02:47,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-23 10:02:47,783 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 202 transitions. [2018-10-23 10:02:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2018-10-23 10:02:47,784 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:02:47,784 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:02:47,784 INFO L424 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:02:47,784 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:02:47,785 INFO L82 PathProgramCache]: Analyzing trace with hash 412394056, now seen corresponding path program 17 times [2018-10-23 10:02:47,785 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:02:47,785 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:02:47,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:02:47,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:02:47,786 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:02:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:02:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:02:48,342 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:02:48,343 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:02:48,343 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:02:48,343 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:02:48,343 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:02:48,343 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:02:48,351 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:02:48,352 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:02:48,414 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:02:48,415 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:02:48,417 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:02:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:02:48,453 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:03:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 489 refuted. 6 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:03:12,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:03:12,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2018-10-23 10:03:12,873 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:03:12,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-23 10:03:12,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-23 10:03:12,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=1117, Unknown=5, NotChecked=0, Total=1560 [2018-10-23 10:03:12,874 INFO L87 Difference]: Start difference. First operand 182 states and 202 transitions. Second operand 21 states. [2018-10-23 10:03:14,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:03:14,614 INFO L93 Difference]: Finished difference Result 315 states and 358 transitions. [2018-10-23 10:03:14,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-23 10:03:14,614 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 70 [2018-10-23 10:03:14,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:03:14,616 INFO L225 Difference]: With dead ends: 315 [2018-10-23 10:03:14,616 INFO L226 Difference]: Without dead ends: 195 [2018-10-23 10:03:14,617 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=438, Invalid=1117, Unknown=5, NotChecked=0, Total=1560 [2018-10-23 10:03:14,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-23 10:03:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 191. [2018-10-23 10:03:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2018-10-23 10:03:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 212 transitions. [2018-10-23 10:03:14,628 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 212 transitions. Word has length 70 [2018-10-23 10:03:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:03:14,629 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 212 transitions. [2018-10-23 10:03:14,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-23 10:03:14,629 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 212 transitions. [2018-10-23 10:03:14,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2018-10-23 10:03:14,630 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:03:14,630 INFO L375 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:03:14,630 INFO L424 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:03:14,630 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:03:14,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1776744989, now seen corresponding path program 18 times [2018-10-23 10:03:14,630 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:03:14,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:03:14,631 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:03:14,631 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:03:14,631 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:03:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:03:15,435 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:03:15,435 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:03:15,435 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:03:15,435 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:03:15,435 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:03:15,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:03:15,436 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:03:15,444 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-23 10:03:15,444 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder TERMS_WITH_SMALL_CONSTANTS_FIRST (IT: FPandBP) [2018-10-23 10:03:15,508 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-23 10:03:15,508 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:03:15,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:03:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:03:15,555 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:03:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 542 refuted. 9 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:03:45,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:03:45,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 42 [2018-10-23 10:03:45,905 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:03:45,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-23 10:03:45,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-23 10:03:45,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1237, Unknown=4, NotChecked=0, Total=1722 [2018-10-23 10:03:45,907 INFO L87 Difference]: Start difference. First operand 191 states and 212 transitions. Second operand 22 states. [2018-10-23 10:03:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:03:49,702 INFO L93 Difference]: Finished difference Result 330 states and 375 transitions. [2018-10-23 10:03:49,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-23 10:03:49,702 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2018-10-23 10:03:49,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:03:49,704 INFO L225 Difference]: With dead ends: 330 [2018-10-23 10:03:49,704 INFO L226 Difference]: Without dead ends: 204 [2018-10-23 10:03:49,705 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=481, Invalid=1237, Unknown=4, NotChecked=0, Total=1722 [2018-10-23 10:03:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-23 10:03:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2018-10-23 10:03:49,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2018-10-23 10:03:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2018-10-23 10:03:49,714 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 73 [2018-10-23 10:03:49,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:03:49,715 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2018-10-23 10:03:49,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-23 10:03:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2018-10-23 10:03:49,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-23 10:03:49,716 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:03:49,716 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:03:49,716 INFO L424 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:03:49,716 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:03:49,716 INFO L82 PathProgramCache]: Analyzing trace with hash -415099352, now seen corresponding path program 19 times [2018-10-23 10:03:49,716 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:03:49,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:03:49,717 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-23 10:03:49,717 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:03:49,717 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:03:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:03:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:03:50,791 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:03:50,791 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:03:50,792 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:03:50,792 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:03:50,792 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:03:50,792 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:03:50,802 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:03:50,803 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2018-10-23 10:03:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:03:50,874 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:03:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:03:51,040 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-10-23 10:04:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 595 refuted. 15 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:04:28,921 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2018-10-23 10:04:28,921 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2018-10-23 10:04:28,921 INFO L251 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2018-10-23 10:04:28,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-23 10:04:28,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-23 10:04:28,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1360, Unknown=6, NotChecked=0, Total=1892 [2018-10-23 10:04:28,925 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand 23 states. [2018-10-23 10:04:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-23 10:04:31,262 INFO L93 Difference]: Finished difference Result 345 states and 392 transitions. [2018-10-23 10:04:31,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-23 10:04:31,262 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 76 [2018-10-23 10:04:31,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-23 10:04:31,264 INFO L225 Difference]: With dead ends: 345 [2018-10-23 10:04:31,264 INFO L226 Difference]: Without dead ends: 213 [2018-10-23 10:04:31,266 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=526, Invalid=1360, Unknown=6, NotChecked=0, Total=1892 [2018-10-23 10:04:31,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-10-23 10:04:31,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 209. [2018-10-23 10:04:31,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2018-10-23 10:04:31,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 232 transitions. [2018-10-23 10:04:31,276 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 232 transitions. Word has length 76 [2018-10-23 10:04:31,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-23 10:04:31,276 INFO L481 AbstractCegarLoop]: Abstraction has 209 states and 232 transitions. [2018-10-23 10:04:31,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-23 10:04:31,276 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 232 transitions. [2018-10-23 10:04:31,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-23 10:04:31,277 INFO L367 BasicCegarLoop]: Found error trace [2018-10-23 10:04:31,277 INFO L375 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-23 10:04:31,277 INFO L424 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-10-23 10:04:31,278 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-23 10:04:31,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1262060995, now seen corresponding path program 20 times [2018-10-23 10:04:31,278 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-10-23 10:04:31,278 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:04:31,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-23 10:04:31,279 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-23 10:04:31,279 INFO L288 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-10-23 10:04:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-23 10:04:32,187 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:04:32,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:04:32,188 INFO L194 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-10-23 10:04:32,188 INFO L184 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2018-10-23 10:04:32,188 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2018-10-23 10:04:32,188 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-23 10:04:32,188 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:04:32,195 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-23 10:04:32,196 INFO L288 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST1 (IT: FPandBP) [2018-10-23 10:04:32,276 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-23 10:04:32,276 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-23 10:04:32,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-23 10:04:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-23 10:04:32,401 INFO L316 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2018-10-23 10:04:56,822 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-23 10:04:57,023 WARN L522 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-23 10:04:57,023 WARN L550 AbstractCegarLoop]: Verification canceled [2018-10-23 10:04:57,029 WARN L205 ceAbstractionStarter]: Timeout [2018-10-23 10:04:57,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:04:57 BoogieIcfgContainer [2018-10-23 10:04:57,030 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-23 10:04:57,031 INFO L168 Benchmark]: Toolchain (without parser) took 273269.76 ms. Allocated memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: 962.6 MB). Free memory was 1.4 GB in the beginning and 1.6 GB in the end (delta: -169.4 MB). Peak memory consumption was 793.2 MB. Max. memory is 7.1 GB. [2018-10-23 10:04:57,032 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 10:04:57,032 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.75 ms. Allocated memory is still 1.5 GB. Free memory was 1.4 GB in the beginning and 1.4 GB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2018-10-23 10:04:57,033 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.46 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 10:04:57,033 INFO L168 Benchmark]: Boogie Preprocessor took 39.83 ms. Allocated memory is still 1.5 GB. Free memory is still 1.4 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-23 10:04:57,034 INFO L168 Benchmark]: RCFGBuilder took 637.18 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 724.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -767.3 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2018-10-23 10:04:57,034 INFO L168 Benchmark]: TraceAbstraction took 272228.74 ms. Allocated memory was 2.2 GB in the beginning and 2.5 GB in the end (delta: 238.0 MB). Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 587.3 MB). Peak memory consumption was 825.4 MB. Max. memory is 7.1 GB. [2018-10-23 10:04:57,038 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 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 317.75 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 41.46 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 39.83 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 637.18 ms. Allocated memory was 1.5 GB in the beginning and 2.2 GB in the end (delta: 724.6 MB). Free memory was 1.4 GB in the beginning and 2.2 GB in the end (delta: -767.3 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 272228.74 ms. Allocated memory was 2.2 GB in the beginning and 2.5 GB in the end (delta: 238.0 MB). Free memory was 2.2 GB in the beginning and 1.6 GB in the end (delta: 587.3 MB). Peak memory consumption was 825.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 11]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 11). Cancelled while BasicCegarLoop was analyzing trace of length 80 with TraceHistMax 22,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 41 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 29 locations, 1 error locations. TIMEOUT Result, 272.1s OverallTime, 22 OverallIterations, 22 TraceHistogramMax, 27.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1476 SDtfs, 958 SDslu, 15380 SDs, 0 SdLazy, 20360 SolverSat, 262 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 23.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2110 GetRequests, 1606 SyntacticMatches, 37 SemanticMatches, 467 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 212.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=209occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 1.7s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 21 MinimizatonAttempts, 95 StatesRemovedByMinimization, 20 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 214.3s InterpolantComputationTime, 1887 NumberOfCodeBlocks, 1887 NumberOfCodeBlocksAsserted, 52 NumberOfCheckSat, 2756 ConstructedInterpolants, 0 QuantifiedInterpolants, 789304 SizeOfPredicates, 34 NumberOfNonLiveVariables, 4261 ConjunctsInSsa, 494 ConjunctsInUnsatCore, 59 InterpolantComputations, 2 PerfectInterpolantSequences, 0/13209 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown