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/Problem11_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:05:16,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:05:16,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:05:16,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:05:16,310 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:05:16,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:05:16,312 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:05:16,314 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:05:16,316 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:05:16,317 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:05:16,318 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:05:16,319 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:05:16,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:05:16,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:05:16,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:05:16,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:05:16,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:05:16,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:05:16,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:05:16,328 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:05:16,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:05:16,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:05:16,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:05:16,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:05:16,335 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:05:16,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:05:16,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:05:16,343 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:05:16,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:05:16,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:05:16,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:05:16,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:05:16,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:05:16,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:05:16,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:05:16,352 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:05:16,353 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 [2019-10-13 20:05:16,369 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:05:16,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:05:16,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:05:16,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:05:16,371 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:05:16,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:05:16,375 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:05:16,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:05:16,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:05:16,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:05:16,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:05:16,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:05:16,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:05:16,377 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:05:16,378 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:05:16,378 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:05:16,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:05:16,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:05:16,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:05:16,379 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:05:16,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:05:16,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:05:16,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:05:16,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:05:16,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:05:16,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:05:16,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:05:16,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:05:16,381 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 [2019-10-13 20:05:16,677 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:05:16,690 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:05:16,694 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:05:16,695 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:05:16,695 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:05:16,696 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label59.c [2019-10-13 20:05:16,760 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8e61d332/0c64f51b0f774309817641462b86ec51/FLAG44582ec76 [2019-10-13 20:05:17,390 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:05:17,391 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label59.c [2019-10-13 20:05:17,409 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8e61d332/0c64f51b0f774309817641462b86ec51/FLAG44582ec76 [2019-10-13 20:05:17,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d8e61d332/0c64f51b0f774309817641462b86ec51 [2019-10-13 20:05:17,643 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:05:17,645 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:05:17,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:17,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:05:17,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:05:17,651 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:17" (1/1) ... [2019-10-13 20:05:17,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@404140b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:17, skipping insertion in model container [2019-10-13 20:05:17,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:17" (1/1) ... [2019-10-13 20:05:17,661 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:05:17,732 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:05:18,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:18,655 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:05:18,825 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:18,843 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:05:18,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:18 WrapperNode [2019-10-13 20:05:18,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:18,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:05:18,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:05:18,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:05:18,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:18" (1/1) ... [2019-10-13 20:05:18,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:18" (1/1) ... [2019-10-13 20:05:18,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:18" (1/1) ... [2019-10-13 20:05:18,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:18" (1/1) ... [2019-10-13 20:05:18,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:18" (1/1) ... [2019-10-13 20:05:18,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:18" (1/1) ... [2019-10-13 20:05:18,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:18" (1/1) ... [2019-10-13 20:05:18,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:05:18,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:05:18,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:05:18,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:05:18,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:18" (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 [2019-10-13 20:05:19,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:05:19,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:05:19,073 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:05:19,073 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:05:19,074 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:05:19,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:05:19,075 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:05:19,075 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:05:19,076 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:05:19,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:05:19,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:05:21,041 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:05:21,041 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:05:21,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:21 BoogieIcfgContainer [2019-10-13 20:05:21,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:05:21,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:05:21,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:05:21,049 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:05:21,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:05:17" (1/3) ... [2019-10-13 20:05:21,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405c6584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:21, skipping insertion in model container [2019-10-13 20:05:21,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:18" (2/3) ... [2019-10-13 20:05:21,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405c6584 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:21, skipping insertion in model container [2019-10-13 20:05:21,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:21" (3/3) ... [2019-10-13 20:05:21,054 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label59.c [2019-10-13 20:05:21,066 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:05:21,076 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:05:21,090 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:05:21,123 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:05:21,124 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:05:21,124 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:05:21,124 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:05:21,124 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:05:21,124 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:05:21,125 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:05:21,125 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:05:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:05:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-13 20:05:21,164 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:21,165 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:21,167 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:21,173 INFO L82 PathProgramCache]: Analyzing trace with hash -912328190, now seen corresponding path program 1 times [2019-10-13 20:05:21,183 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:21,183 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767757570] [2019-10-13 20:05:21,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:21,184 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:21,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:21,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767757570] [2019-10-13 20:05:21,640 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:21,641 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:05:21,641 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817750661] [2019-10-13 20:05:21,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:05:21,650 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:21,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:05:21,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:05:21,669 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-13 20:05:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:23,159 INFO L93 Difference]: Finished difference Result 782 states and 1375 transitions. [2019-10-13 20:05:23,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:05:23,161 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2019-10-13 20:05:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:23,180 INFO L225 Difference]: With dead ends: 782 [2019-10-13 20:05:23,180 INFO L226 Difference]: Without dead ends: 428 [2019-10-13 20:05:23,187 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:05:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2019-10-13 20:05:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 420. [2019-10-13 20:05:23,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-13 20:05:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 671 transitions. [2019-10-13 20:05:23,299 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 671 transitions. Word has length 65 [2019-10-13 20:05:23,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:23,300 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 671 transitions. [2019-10-13 20:05:23,300 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:05:23,301 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 671 transitions. [2019-10-13 20:05:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 20:05:23,308 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:23,308 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, 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] [2019-10-13 20:05:23,309 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:23,309 INFO L82 PathProgramCache]: Analyzing trace with hash -588923191, now seen corresponding path program 1 times [2019-10-13 20:05:23,309 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:23,310 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055221388] [2019-10-13 20:05:23,310 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:23,310 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:23,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:23,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055221388] [2019-10-13 20:05:23,569 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:23,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:05:23,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511644826] [2019-10-13 20:05:23,572 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:05:23,572 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:23,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:05:23,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:05:23,573 INFO L87 Difference]: Start difference. First operand 420 states and 671 transitions. Second operand 6 states. [2019-10-13 20:05:25,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:25,548 INFO L93 Difference]: Finished difference Result 1255 states and 2035 transitions. [2019-10-13 20:05:25,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 20:05:25,553 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-10-13 20:05:25,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:25,561 INFO L225 Difference]: With dead ends: 1255 [2019-10-13 20:05:25,562 INFO L226 Difference]: Without dead ends: 841 [2019-10-13 20:05:25,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:05:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2019-10-13 20:05:25,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 817. [2019-10-13 20:05:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2019-10-13 20:05:25,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1174 transitions. [2019-10-13 20:05:25,638 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1174 transitions. Word has length 134 [2019-10-13 20:05:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:25,641 INFO L462 AbstractCegarLoop]: Abstraction has 817 states and 1174 transitions. [2019-10-13 20:05:25,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:05:25,641 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1174 transitions. [2019-10-13 20:05:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 20:05:25,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:25,649 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, 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] [2019-10-13 20:05:25,649 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:25,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:25,650 INFO L82 PathProgramCache]: Analyzing trace with hash 578512354, now seen corresponding path program 1 times [2019-10-13 20:05:25,654 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:25,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596954599] [2019-10-13 20:05:25,654 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:25,655 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:25,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:25,932 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:25,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596954599] [2019-10-13 20:05:25,933 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:25,933 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:05:25,933 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601291082] [2019-10-13 20:05:25,934 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:05:25,934 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:25,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:05:25,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:05:25,935 INFO L87 Difference]: Start difference. First operand 817 states and 1174 transitions. Second operand 6 states. [2019-10-13 20:05:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:27,602 INFO L93 Difference]: Finished difference Result 2046 states and 2973 transitions. [2019-10-13 20:05:27,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:05:27,606 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-10-13 20:05:27,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:27,614 INFO L225 Difference]: With dead ends: 2046 [2019-10-13 20:05:27,614 INFO L226 Difference]: Without dead ends: 1235 [2019-10-13 20:05:27,616 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 [2019-10-13 20:05:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2019-10-13 20:05:27,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1221. [2019-10-13 20:05:27,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1221 states. [2019-10-13 20:05:27,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1725 transitions. [2019-10-13 20:05:27,658 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1725 transitions. Word has length 137 [2019-10-13 20:05:27,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:27,659 INFO L462 AbstractCegarLoop]: Abstraction has 1221 states and 1725 transitions. [2019-10-13 20:05:27,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:05:27,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1725 transitions. [2019-10-13 20:05:27,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 20:05:27,662 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:27,662 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, 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] [2019-10-13 20:05:27,662 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:27,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:27,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2098670063, now seen corresponding path program 1 times [2019-10-13 20:05:27,663 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:27,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597388494] [2019-10-13 20:05:27,663 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:27,664 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:27,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:27,879 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597388494] [2019-10-13 20:05:27,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672256608] [2019-10-13 20:05:27,880 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 [2019-10-13 20:05:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:27,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:05:27,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:28,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:28,186 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:28,387 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:28,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:28,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:28,393 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:28,394 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:28,396 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:28,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:28,399 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:05:28,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:28,509 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:05:28,694 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:28,694 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:05:28,695 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 13 [2019-10-13 20:05:28,695 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133550951] [2019-10-13 20:05:28,696 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 20:05:28,696 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:28,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 20:05:28,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-13 20:05:28,698 INFO L87 Difference]: Start difference. First operand 1221 states and 1725 transitions. Second operand 7 states. [2019-10-13 20:05:31,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:31,258 INFO L93 Difference]: Finished difference Result 4051 states and 6044 transitions. [2019-10-13 20:05:31,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 20:05:31,258 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 138 [2019-10-13 20:05:31,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:31,277 INFO L225 Difference]: With dead ends: 4051 [2019-10-13 20:05:31,278 INFO L226 Difference]: Without dead ends: 2836 [2019-10-13 20:05:31,283 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-10-13 20:05:31,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-10-13 20:05:31,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2789. [2019-10-13 20:05:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2789 states. [2019-10-13 20:05:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 3710 transitions. [2019-10-13 20:05:31,402 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 3710 transitions. Word has length 138 [2019-10-13 20:05:31,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:31,404 INFO L462 AbstractCegarLoop]: Abstraction has 2789 states and 3710 transitions. [2019-10-13 20:05:31,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 20:05:31,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 3710 transitions. [2019-10-13 20:05:31,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-13 20:05:31,408 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:31,409 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, 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] [2019-10-13 20:05:31,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:31,615 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:31,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:31,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1755774456, now seen corresponding path program 1 times [2019-10-13 20:05:31,616 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:31,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669796110] [2019-10-13 20:05:31,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:31,617 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:31,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:31,766 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:31,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669796110] [2019-10-13 20:05:31,767 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:31,767 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:05:31,767 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934575496] [2019-10-13 20:05:31,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:05:31,768 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:31,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:05:31,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:05:31,769 INFO L87 Difference]: Start difference. First operand 2789 states and 3710 transitions. Second operand 3 states. [2019-10-13 20:05:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:32,781 INFO L93 Difference]: Finished difference Result 7093 states and 9721 transitions. [2019-10-13 20:05:32,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:05:32,792 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2019-10-13 20:05:32,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:32,819 INFO L225 Difference]: With dead ends: 7093 [2019-10-13 20:05:32,820 INFO L226 Difference]: Without dead ends: 4310 [2019-10-13 20:05:32,830 INFO L600 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 [2019-10-13 20:05:32,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2019-10-13 20:05:32,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4310. [2019-10-13 20:05:32,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4310 states. [2019-10-13 20:05:32,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4310 states to 4310 states and 5505 transitions. [2019-10-13 20:05:32,960 INFO L78 Accepts]: Start accepts. Automaton has 4310 states and 5505 transitions. Word has length 196 [2019-10-13 20:05:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:32,960 INFO L462 AbstractCegarLoop]: Abstraction has 4310 states and 5505 transitions. [2019-10-13 20:05:32,961 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:05:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 4310 states and 5505 transitions. [2019-10-13 20:05:32,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-10-13 20:05:32,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:32,967 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, 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] [2019-10-13 20:05:32,967 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:32,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:32,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2033318321, now seen corresponding path program 1 times [2019-10-13 20:05:32,968 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:32,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156615874] [2019-10-13 20:05:32,968 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:32,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:32,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:33,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156615874] [2019-10-13 20:05:33,151 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:33,151 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:33,152 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736775977] [2019-10-13 20:05:33,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:33,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:33,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:33,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:33,158 INFO L87 Difference]: Start difference. First operand 4310 states and 5505 transitions. Second operand 4 states. [2019-10-13 20:05:35,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:35,285 INFO L93 Difference]: Finished difference Result 11285 states and 14911 transitions. [2019-10-13 20:05:35,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:05:35,291 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 212 [2019-10-13 20:05:35,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:35,330 INFO L225 Difference]: With dead ends: 11285 [2019-10-13 20:05:35,331 INFO L226 Difference]: Without dead ends: 6981 [2019-10-13 20:05:35,345 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 [2019-10-13 20:05:35,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6981 states. [2019-10-13 20:05:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6981 to 5830. [2019-10-13 20:05:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5830 states. [2019-10-13 20:05:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5830 states to 5830 states and 7357 transitions. [2019-10-13 20:05:35,527 INFO L78 Accepts]: Start accepts. Automaton has 5830 states and 7357 transitions. Word has length 212 [2019-10-13 20:05:35,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:35,529 INFO L462 AbstractCegarLoop]: Abstraction has 5830 states and 7357 transitions. [2019-10-13 20:05:35,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:05:35,530 INFO L276 IsEmpty]: Start isEmpty. Operand 5830 states and 7357 transitions. [2019-10-13 20:05:35,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-10-13 20:05:35,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:35,540 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:35,540 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:35,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:35,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1831339210, now seen corresponding path program 1 times [2019-10-13 20:05:35,542 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:35,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730522036] [2019-10-13 20:05:35,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:35,543 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:35,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:35,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730522036] [2019-10-13 20:05:35,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066419301] [2019-10-13 20:05:35,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:05:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:36,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:05:36,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:36,205 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:36,397 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:36,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [30634348] [2019-10-13 20:05:36,403 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 293 [2019-10-13 20:05:36,463 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:05:36,464 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)