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/eca-rers2012/Problem16_label10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:08:05,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:08:05,047 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:08:05,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:08:05,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:08:05,062 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:08:05,064 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:08:05,065 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:08:05,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:08:05,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:08:05,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:08:05,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:08:05,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:08:05,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:08:05,072 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:08:05,074 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:08:05,075 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:08:05,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:08:05,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:08:05,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:08:05,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:08:05,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:08:05,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:08:05,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:08:05,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:08:05,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:08:05,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:08:05,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:08:05,113 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 00:08:05,132 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:08:05,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:08:05,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:08:05,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:08:05,135 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:08:05,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:08:05,136 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:08:05,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:08:05,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:08:05,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:08:05,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:08:05,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:08:05,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:08:05,138 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:08:05,138 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:08:05,138 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:08:05,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:08:05,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:08:05,139 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:08:05,139 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:08:05,139 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:08:05,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:08:05,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:08:05,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:08:05,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:08:05,140 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:08:05,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:08:05,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:08:05,141 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 00:08:05,465 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:08:05,482 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:08:05,486 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:08:05,488 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:08:05,488 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:08:05,489 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label10.c [2019-10-15 00:08:05,560 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc400cb2/8541cf1cb336452aa01d82ef0ec918b1/FLAG43dd1bb59 [2019-10-15 00:08:06,227 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:08:06,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label10.c [2019-10-15 00:08:06,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc400cb2/8541cf1cb336452aa01d82ef0ec918b1/FLAG43dd1bb59 [2019-10-15 00:08:06,388 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/afc400cb2/8541cf1cb336452aa01d82ef0ec918b1 [2019-10-15 00:08:06,399 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:08:06,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:08:06,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:06,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:08:06,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:08:06,412 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:06" (1/1) ... [2019-10-15 00:08:06,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fec71d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:06, skipping insertion in model container [2019-10-15 00:08:06,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:06" (1/1) ... [2019-10-15 00:08:06,424 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:08:06,499 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:08:07,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:07,308 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:08:07,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:07,677 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:08:07,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:07 WrapperNode [2019-10-15 00:08:07,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:07,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:08:07,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:08:07,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:08:07,696 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:07" (1/1) ... [2019-10-15 00:08:07,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:07" (1/1) ... [2019-10-15 00:08:07,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:07" (1/1) ... [2019-10-15 00:08:07,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:07" (1/1) ... [2019-10-15 00:08:07,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:07" (1/1) ... [2019-10-15 00:08:07,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:07" (1/1) ... [2019-10-15 00:08:07,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:07" (1/1) ... [2019-10-15 00:08:07,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:08:07,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:08:07,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:08:07,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:08:07,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:07" (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 00:08:07,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:08:07,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:08:07,947 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:08:07,947 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:08:07,948 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:08:07,948 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:08:07,949 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:08:07,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:08:07,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:08:07,949 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:08:07,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:08:07,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:08:07,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:08:10,196 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:08:10,196 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:08:10,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:10 BoogieIcfgContainer [2019-10-15 00:08:10,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:08:10,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:08:10,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:08:10,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:08:10,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:08:06" (1/3) ... [2019-10-15 00:08:10,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a4e1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:10, skipping insertion in model container [2019-10-15 00:08:10,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:07" (2/3) ... [2019-10-15 00:08:10,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47a4e1a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:10, skipping insertion in model container [2019-10-15 00:08:10,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:10" (3/3) ... [2019-10-15 00:08:10,215 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label10.c [2019-10-15 00:08:10,227 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:08:10,237 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:08:10,249 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:08:10,291 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:08:10,292 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:08:10,292 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:08:10,292 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:08:10,292 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:08:10,292 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:08:10,293 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:08:10,293 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:08:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:08:10,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-15 00:08:10,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:10,329 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:10,331 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:10,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:10,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1129192547, now seen corresponding path program 1 times [2019-10-15 00:08:10,349 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:10,349 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321721949] [2019-10-15 00:08:10,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:10,350 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:10,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:10,755 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 00:08:10,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321721949] [2019-10-15 00:08:10,756 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:10,757 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:08:10,757 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597278233] [2019-10-15 00:08:10,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:10,764 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:10,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:10,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:10,782 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 4 states. [2019-10-15 00:08:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:14,756 INFO L93 Difference]: Finished difference Result 1509 states and 2834 transitions. [2019-10-15 00:08:14,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:14,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-10-15 00:08:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:14,786 INFO L225 Difference]: With dead ends: 1509 [2019-10-15 00:08:14,786 INFO L226 Difference]: Without dead ends: 1019 [2019-10-15 00:08:14,799 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2019-10-15 00:08:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 1019. [2019-10-15 00:08:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1019 states. [2019-10-15 00:08:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1739 transitions. [2019-10-15 00:08:14,927 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1739 transitions. Word has length 38 [2019-10-15 00:08:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:14,928 INFO L462 AbstractCegarLoop]: Abstraction has 1019 states and 1739 transitions. [2019-10-15 00:08:14,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:14,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1739 transitions. [2019-10-15 00:08:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-15 00:08:14,934 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:14,935 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:14,935 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:14,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:14,936 INFO L82 PathProgramCache]: Analyzing trace with hash -2138729124, now seen corresponding path program 1 times [2019-10-15 00:08:14,936 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:14,936 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791642261] [2019-10-15 00:08:14,936 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:14,936 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:14,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:15,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791642261] [2019-10-15 00:08:15,105 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:15,105 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:15,105 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300839691] [2019-10-15 00:08:15,110 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:15,110 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:15,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:15,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:15,111 INFO L87 Difference]: Start difference. First operand 1019 states and 1739 transitions. Second operand 6 states. [2019-10-15 00:08:17,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:17,984 INFO L93 Difference]: Finished difference Result 3097 states and 5370 transitions. [2019-10-15 00:08:17,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:17,985 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-15 00:08:17,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:18,009 INFO L225 Difference]: With dead ends: 3097 [2019-10-15 00:08:18,009 INFO L226 Difference]: Without dead ends: 2084 [2019-10-15 00:08:18,014 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:08:18,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2019-10-15 00:08:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2061. [2019-10-15 00:08:18,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2061 states. [2019-10-15 00:08:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 3384 transitions. [2019-10-15 00:08:18,134 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 3384 transitions. Word has length 108 [2019-10-15 00:08:18,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:18,136 INFO L462 AbstractCegarLoop]: Abstraction has 2061 states and 3384 transitions. [2019-10-15 00:08:18,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:18,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 3384 transitions. [2019-10-15 00:08:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-15 00:08:18,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:18,148 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:18,148 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:18,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:18,150 INFO L82 PathProgramCache]: Analyzing trace with hash -899506204, now seen corresponding path program 1 times [2019-10-15 00:08:18,150 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:18,151 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727282583] [2019-10-15 00:08:18,152 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:18,153 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:18,153 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:18,455 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727282583] [2019-10-15 00:08:18,455 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:18,455 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:18,455 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530552768] [2019-10-15 00:08:18,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:18,458 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:18,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:18,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:18,463 INFO L87 Difference]: Start difference. First operand 2061 states and 3384 transitions. Second operand 6 states. [2019-10-15 00:08:21,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:21,894 INFO L93 Difference]: Finished difference Result 5904 states and 10021 transitions. [2019-10-15 00:08:21,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:21,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2019-10-15 00:08:21,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:21,924 INFO L225 Difference]: With dead ends: 5904 [2019-10-15 00:08:21,925 INFO L226 Difference]: Without dead ends: 3849 [2019-10-15 00:08:21,931 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:08:21,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2019-10-15 00:08:22,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3813. [2019-10-15 00:08:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3813 states. [2019-10-15 00:08:22,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 6183 transitions. [2019-10-15 00:08:22,060 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 6183 transitions. Word has length 136 [2019-10-15 00:08:22,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:22,061 INFO L462 AbstractCegarLoop]: Abstraction has 3813 states and 6183 transitions. [2019-10-15 00:08:22,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:22,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 6183 transitions. [2019-10-15 00:08:22,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 00:08:22,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:22,064 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:22,064 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:22,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:22,065 INFO L82 PathProgramCache]: Analyzing trace with hash -387784608, now seen corresponding path program 1 times [2019-10-15 00:08:22,065 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:22,065 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041774356] [2019-10-15 00:08:22,065 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:22,066 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:22,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:22,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041774356] [2019-10-15 00:08:22,277 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:22,277 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:22,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580298909] [2019-10-15 00:08:22,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:22,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:22,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:22,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:22,279 INFO L87 Difference]: Start difference. First operand 3813 states and 6183 transitions. Second operand 6 states. [2019-10-15 00:08:25,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:25,160 INFO L93 Difference]: Finished difference Result 9749 states and 16101 transitions. [2019-10-15 00:08:25,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:25,160 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 154 [2019-10-15 00:08:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:25,200 INFO L225 Difference]: With dead ends: 9749 [2019-10-15 00:08:25,200 INFO L226 Difference]: Without dead ends: 5942 [2019-10-15 00:08:25,214 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:08:25,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2019-10-15 00:08:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 5896. [2019-10-15 00:08:25,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5896 states. [2019-10-15 00:08:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 8054 transitions. [2019-10-15 00:08:25,423 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 8054 transitions. Word has length 154 [2019-10-15 00:08:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:25,423 INFO L462 AbstractCegarLoop]: Abstraction has 5896 states and 8054 transitions. [2019-10-15 00:08:25,423 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 8054 transitions. [2019-10-15 00:08:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-10-15 00:08:25,426 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:25,427 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:25,427 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:25,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:25,428 INFO L82 PathProgramCache]: Analyzing trace with hash 215437429, now seen corresponding path program 1 times [2019-10-15 00:08:25,428 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:25,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24212894] [2019-10-15 00:08:25,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:25,429 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:25,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:25,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24212894] [2019-10-15 00:08:25,741 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:25,741 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:25,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211664259] [2019-10-15 00:08:25,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:25,743 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:25,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:25,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:25,744 INFO L87 Difference]: Start difference. First operand 5896 states and 8054 transitions. Second operand 6 states. [2019-10-15 00:08:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:28,731 INFO L93 Difference]: Finished difference Result 14575 states and 20025 transitions. [2019-10-15 00:08:28,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:28,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 201 [2019-10-15 00:08:28,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:28,770 INFO L225 Difference]: With dead ends: 14575 [2019-10-15 00:08:28,770 INFO L226 Difference]: Without dead ends: 8685 [2019-10-15 00:08:28,785 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:08:28,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8685 states. [2019-10-15 00:08:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8685 to 8651. [2019-10-15 00:08:28,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8651 states. [2019-10-15 00:08:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8651 states to 8651 states and 11412 transitions. [2019-10-15 00:08:28,994 INFO L78 Accepts]: Start accepts. Automaton has 8651 states and 11412 transitions. Word has length 201 [2019-10-15 00:08:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:28,995 INFO L462 AbstractCegarLoop]: Abstraction has 8651 states and 11412 transitions. [2019-10-15 00:08:28,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:28,995 INFO L276 IsEmpty]: Start isEmpty. Operand 8651 states and 11412 transitions. [2019-10-15 00:08:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-15 00:08:29,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:29,002 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:29,002 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:29,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:29,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1906343064, now seen corresponding path program 1 times [2019-10-15 00:08:29,003 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:29,003 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807357425] [2019-10-15 00:08:29,003 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:29,003 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:29,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-15 00:08:29,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807357425] [2019-10-15 00:08:29,191 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:29,192 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:08:29,192 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624205475] [2019-10-15 00:08:29,193 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:29,193 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:29,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:29,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:29,194 INFO L87 Difference]: Start difference. First operand 8651 states and 11412 transitions. Second operand 4 states. [2019-10-15 00:08:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:32,564 INFO L93 Difference]: Finished difference Result 23062 states and 30660 transitions. [2019-10-15 00:08:32,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:32,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 237 [2019-10-15 00:08:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:32,630 INFO L225 Difference]: With dead ends: 23062 [2019-10-15 00:08:32,630 INFO L226 Difference]: Without dead ends: 14417 [2019-10-15 00:08:32,655 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:08:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14417 states. [2019-10-15 00:08:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14417 to 13741. [2019-10-15 00:08:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13741 states. [2019-10-15 00:08:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13741 states to 13741 states and 17470 transitions. [2019-10-15 00:08:33,039 INFO L78 Accepts]: Start accepts. Automaton has 13741 states and 17470 transitions. Word has length 237 [2019-10-15 00:08:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:33,040 INFO L462 AbstractCegarLoop]: Abstraction has 13741 states and 17470 transitions. [2019-10-15 00:08:33,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 13741 states and 17470 transitions. [2019-10-15 00:08:33,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2019-10-15 00:08:33,060 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:33,060 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:33,061 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:33,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:33,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1225908112, now seen corresponding path program 1 times [2019-10-15 00:08:33,062 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:33,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144378948] [2019-10-15 00:08:33,062 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:33,062 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:33,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 210 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-15 00:08:33,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144378948] [2019-10-15 00:08:33,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469441620] [2019-10-15 00:08:33,432 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 00:08:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:33,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:08:33,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 418 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-15 00:08:33,922 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 452 backedges. 210 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-15 00:08:34,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [264145326] [2019-10-15 00:08:34,362 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 421 [2019-10-15 00:08:34,427 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:08:34,427 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)