java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:05:29,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:05:29,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:05:29,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:05:29,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:05:29,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:05:29,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:05:29,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:05:29,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:05:29,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:05:29,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:05:29,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:05:29,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:05:29,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:05:29,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:05:29,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:05:29,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:05:30,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:05:30,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:05:30,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:05:30,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:05:30,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:05:30,012 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:05:30,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:05:30,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:05:30,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:05:30,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:05:30,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:05:30,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:05:30,069 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:05:30,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:05:30,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:05:30,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:05:30,074 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:05:30,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:05:30,074 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:05:30,075 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:05:30,075 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:05:30,075 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:05:30,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:05:30,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:05:30,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:05:30,077 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:05:30,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:05:30,078 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:05:30,078 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:05:30,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:05:30,078 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:05:30,078 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:05:30,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:05:30,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:05:30,079 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:05:30,079 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:05:30,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:05:30,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:05:30,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:05:30,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:05:30,080 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:05:30,354 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:05:30,370 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:05:30,374 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:05:30,375 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:05:30,376 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:05:30,376 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-10-15 01:05:30,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c001e070d/587ebf1614b14372875b4fd765db61e2/FLAG80afb6762 [2019-10-15 01:05:30,936 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:05:30,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-10-15 01:05:30,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c001e070d/587ebf1614b14372875b4fd765db61e2/FLAG80afb6762 [2019-10-15 01:05:31,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c001e070d/587ebf1614b14372875b4fd765db61e2 [2019-10-15 01:05:31,320 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:05:31,322 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:05:31,326 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:05:31,326 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:05:31,330 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:05:31,331 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:05:31" (1/1) ... [2019-10-15 01:05:31,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a120bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:31, skipping insertion in model container [2019-10-15 01:05:31,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:05:31" (1/1) ... [2019-10-15 01:05:31,343 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:05:31,363 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:05:31,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:05:31,569 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:05:31,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:05:31,600 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:05:31,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:31 WrapperNode [2019-10-15 01:05:31,600 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:05:31,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:05:31,601 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:05:31,601 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:05:31,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:31" (1/1) ... [2019-10-15 01:05:31,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:31" (1/1) ... [2019-10-15 01:05:31,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:31" (1/1) ... [2019-10-15 01:05:31,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:31" (1/1) ... [2019-10-15 01:05:31,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:31" (1/1) ... [2019-10-15 01:05:31,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:31" (1/1) ... [2019-10-15 01:05:31,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:31" (1/1) ... [2019-10-15 01:05:31,716 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:05:31,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:05:31,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:05:31,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:05:31,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:05:31,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:05:31,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:05:31,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:05:31,768 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:05:31,768 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:05:31,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:05:31,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:05:31,769 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:05:31,769 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:05:31,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:05:31,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:05:31,976 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:05:31,976 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:05:31,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:05:31 BoogieIcfgContainer [2019-10-15 01:05:31,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:05:31,979 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:05:31,979 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:05:31,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:05:31,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:05:31" (1/3) ... [2019-10-15 01:05:31,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31809640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:05:31, skipping insertion in model container [2019-10-15 01:05:31,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:05:31" (2/3) ... [2019-10-15 01:05:31,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31809640 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:05:31, skipping insertion in model container [2019-10-15 01:05:31,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:05:31" (3/3) ... [2019-10-15 01:05:31,985 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2019-10-15 01:05:31,995 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:05:32,002 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:05:32,013 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:05:32,036 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:05:32,037 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:05:32,037 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:05:32,037 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:05:32,037 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:05:32,037 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:05:32,037 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:05:32,038 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:05:32,053 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:05:32,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 01:05:32,059 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:32,060 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:32,062 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:32,067 INFO L82 PathProgramCache]: Analyzing trace with hash -382823925, now seen corresponding path program 1 times [2019-10-15 01:05:32,074 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:32,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857338053] [2019-10-15 01:05:32,075 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:32,075 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:32,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:32,173 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857338053] [2019-10-15 01:05:32,173 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:05:32,174 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:05:32,174 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867204100] [2019-10-15 01:05:32,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:05:32,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:32,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:05:32,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:05:32,194 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-10-15 01:05:32,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:32,218 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2019-10-15 01:05:32,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:05:32,220 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-10-15 01:05:32,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:32,230 INFO L225 Difference]: With dead ends: 35 [2019-10-15 01:05:32,230 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 01:05:32,234 INFO L600 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 [2019-10-15 01:05:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 01:05:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 01:05:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 01:05:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-10-15 01:05:32,270 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2019-10-15 01:05:32,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:32,271 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-10-15 01:05:32,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:05:32,271 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-10-15 01:05:32,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:05:32,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:32,272 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:32,272 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:32,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:32,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1944032635, now seen corresponding path program 1 times [2019-10-15 01:05:32,273 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:32,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400178456] [2019-10-15 01:05:32,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:32,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:32,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:32,653 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 16 [2019-10-15 01:05:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:32,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400178456] [2019-10-15 01:05:32,681 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:05:32,682 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:05:32,682 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681138432] [2019-10-15 01:05:32,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:05:32,684 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:05:32,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:05:32,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:05:32,685 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-10-15 01:05:32,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:05:32,733 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-10-15 01:05:32,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:05:32,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-15 01:05:32,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:05:32,736 INFO L225 Difference]: With dead ends: 23 [2019-10-15 01:05:32,736 INFO L226 Difference]: Without dead ends: 17 [2019-10-15 01:05:32,737 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:05:32,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-15 01:05:32,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-15 01:05:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-15 01:05:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-10-15 01:05:32,744 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2019-10-15 01:05:32,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:05:32,744 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-10-15 01:05:32,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:05:32,745 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-10-15 01:05:32,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-15 01:05:32,746 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:05:32,746 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:05:32,746 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:05:32,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:05:32,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1646139566, now seen corresponding path program 1 times [2019-10-15 01:05:32,747 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:05:32,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246309229] [2019-10-15 01:05:32,748 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:32,748 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:05:32,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:05:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:35,103 WARN L191 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 83 DAG size of output: 10 [2019-10-15 01:05:35,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:35,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246309229] [2019-10-15 01:05:35,153 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251917111] [2019-10-15 01:05:35,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:05:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:05:35,209 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-15 01:05:35,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:05:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:35,353 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:05:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:05:35,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1787552806] [2019-10-15 01:05:35,467 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 17 [2019-10-15 01:05:35,510 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:05:35,511 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:05:35,640 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.