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_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:04:15,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:04:15,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:04:15,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:04:15,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:04:15,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:04:15,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:04:15,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:04:15,138 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:04:15,143 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:04:15,144 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:04:15,144 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:04:15,145 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:04:15,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:04:15,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:04:15,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:04:15,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:04:15,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:04:15,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:04:15,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:04:15,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:04:15,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:04:15,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:04:15,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:04:15,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:04:15,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:04:15,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:04:15,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:04:15,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:04:15,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:04:15,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:04:15,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:04:15,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:04:15,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:04:15,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:04:15,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:04:15,167 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 20:04:15,189 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:04:15,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:04:15,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:04:15,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:04:15,194 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:04:15,194 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:04:15,194 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:04:15,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:04:15,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:04:15,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:04:15,195 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:04:15,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:04:15,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:04:15,196 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:04:15,196 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:04:15,196 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:04:15,196 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:04:15,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:04:15,197 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:04:15,197 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:04:15,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:04:15,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:04:15,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:04:15,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:04:15,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:04:15,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:04:15,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:04:15,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:04:15,199 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 20:04:15,481 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:04:15,501 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:04:15,505 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:04:15,507 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:04:15,507 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:04:15,508 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label20.c [2019-10-13 20:04:15,576 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b7d696dd/7139e27d5a54490389cd77fc74bace26/FLAGe9cf9e898 [2019-10-13 20:04:16,203 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:04:16,204 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label20.c [2019-10-13 20:04:16,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b7d696dd/7139e27d5a54490389cd77fc74bace26/FLAGe9cf9e898 [2019-10-13 20:04:16,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b7d696dd/7139e27d5a54490389cd77fc74bace26 [2019-10-13 20:04:16,419 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:04:16,421 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:04:16,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:16,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:04:16,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:04:16,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:16" (1/1) ... [2019-10-13 20:04:16,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3127bf5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:16, skipping insertion in model container [2019-10-13 20:04:16,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:16" (1/1) ... [2019-10-13 20:04:16,436 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:04:16,491 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:04:17,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:17,191 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:04:17,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:17,366 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:04:17,367 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17 WrapperNode [2019-10-13 20:04:17,367 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:17,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:04:17,368 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:04:17,368 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:04:17,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2019-10-13 20:04:17,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2019-10-13 20:04:17,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2019-10-13 20:04:17,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2019-10-13 20:04:17,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2019-10-13 20:04:17,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2019-10-13 20:04:17,552 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (1/1) ... [2019-10-13 20:04:17,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:04:17,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:04:17,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:04:17,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:04:17,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (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 20:04:17,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:04:17,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:04:17,645 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:04:17,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:04:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:04:17,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:04:17,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:04:17,647 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:04:17,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:04:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:04:17,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:04:19,526 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:04:19,529 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:04:19,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:19 BoogieIcfgContainer [2019-10-13 20:04:19,530 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:04:19,532 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:04:19,532 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:04:19,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:04:19,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:04:16" (1/3) ... [2019-10-13 20:04:19,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662a4103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:19, skipping insertion in model container [2019-10-13 20:04:19,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:17" (2/3) ... [2019-10-13 20:04:19,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662a4103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:19, skipping insertion in model container [2019-10-13 20:04:19,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:19" (3/3) ... [2019-10-13 20:04:19,542 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label20.c [2019-10-13 20:04:19,553 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:04:19,568 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:04:19,582 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:04:19,627 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:04:19,627 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:04:19,628 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:04:19,628 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:04:19,628 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:04:19,628 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:04:19,628 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:04:19,629 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:04:19,664 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:04:19,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 20:04:19,672 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:19,673 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:04:19,676 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:19,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash -960649190, now seen corresponding path program 1 times [2019-10-13 20:04:19,695 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:19,695 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506043241] [2019-10-13 20:04:19,696 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:19,696 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:19,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:19,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:20,034 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 20:04:20,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506043241] [2019-10-13 20:04:20,038 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:20,038 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:04:20,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916824321] [2019-10-13 20:04:20,044 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:04:20,046 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:20,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:04:20,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:04:20,065 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-13 20:04:22,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:22,287 INFO L93 Difference]: Finished difference Result 978 states and 1754 transitions. [2019-10-13 20:04:22,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:04:22,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-13 20:04:22,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:22,311 INFO L225 Difference]: With dead ends: 978 [2019-10-13 20:04:22,311 INFO L226 Difference]: Without dead ends: 619 [2019-10-13 20:04:22,320 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 [2019-10-13 20:04:22,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-10-13 20:04:22,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 619. [2019-10-13 20:04:22,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2019-10-13 20:04:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 859 transitions. [2019-10-13 20:04:22,424 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 859 transitions. Word has length 15 [2019-10-13 20:04:22,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:22,432 INFO L462 AbstractCegarLoop]: Abstraction has 619 states and 859 transitions. [2019-10-13 20:04:22,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:04:22,432 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 859 transitions. [2019-10-13 20:04:22,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-13 20:04:22,441 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:22,442 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:04:22,443 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:22,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:22,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1986341175, now seen corresponding path program 1 times [2019-10-13 20:04:22,443 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:22,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26439296] [2019-10-13 20:04:22,444 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:22,444 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:22,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:22,698 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26439296] [2019-10-13 20:04:22,698 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:22,699 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:04:22,699 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813289727] [2019-10-13 20:04:22,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:04:22,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:22,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:04:22,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:04:22,706 INFO L87 Difference]: Start difference. First operand 619 states and 859 transitions. Second operand 4 states. [2019-10-13 20:04:24,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:24,698 INFO L93 Difference]: Finished difference Result 2382 states and 3379 transitions. [2019-10-13 20:04:24,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:04:24,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2019-10-13 20:04:24,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:24,712 INFO L225 Difference]: With dead ends: 2382 [2019-10-13 20:04:24,712 INFO L226 Difference]: Without dead ends: 1769 [2019-10-13 20:04:24,715 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 20:04:24,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1769 states. [2019-10-13 20:04:24,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1769 to 1751. [2019-10-13 20:04:24,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1751 states. [2019-10-13 20:04:24,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2367 transitions. [2019-10-13 20:04:24,804 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2367 transitions. Word has length 88 [2019-10-13 20:04:24,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:24,805 INFO L462 AbstractCegarLoop]: Abstraction has 1751 states and 2367 transitions. [2019-10-13 20:04:24,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:04:24,805 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2367 transitions. [2019-10-13 20:04:24,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-13 20:04:24,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:24,813 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:04:24,814 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:24,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2070996454, now seen corresponding path program 1 times [2019-10-13 20:04:24,814 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:24,815 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399264072] [2019-10-13 20:04:24,815 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:24,815 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:24,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:25,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399264072] [2019-10-13 20:04:25,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833267112] [2019-10-13 20:04:25,036 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 20:04:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:25,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:04:25,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:25,259 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:04:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:25,305 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:25,499 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:25,500 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:25,501 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:25,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:25,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:04:25,507 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:25,508 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:25,510 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:04:25,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:25,614 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:25,737 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:04:25,737 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [7] total 12 [2019-10-13 20:04:25,737 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125283831] [2019-10-13 20:04:25,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 20:04:25,741 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:25,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 20:04:25,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:04:25,742 INFO L87 Difference]: Start difference. First operand 1751 states and 2367 transitions. Second operand 7 states. [2019-10-13 20:04:28,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:28,458 INFO L93 Difference]: Finished difference Result 5696 states and 8124 transitions. [2019-10-13 20:04:28,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 20:04:28,459 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 109 [2019-10-13 20:04:28,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:28,486 INFO L225 Difference]: With dead ends: 5696 [2019-10-13 20:04:28,487 INFO L226 Difference]: Without dead ends: 3951 [2019-10-13 20:04:28,493 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2019-10-13 20:04:28,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2019-10-13 20:04:28,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3350. [2019-10-13 20:04:28,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3350 states. [2019-10-13 20:04:28,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3350 states to 3350 states and 4400 transitions. [2019-10-13 20:04:28,617 INFO L78 Accepts]: Start accepts. Automaton has 3350 states and 4400 transitions. Word has length 109 [2019-10-13 20:04:28,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:28,618 INFO L462 AbstractCegarLoop]: Abstraction has 3350 states and 4400 transitions. [2019-10-13 20:04:28,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 20:04:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3350 states and 4400 transitions. [2019-10-13 20:04:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-10-13 20:04:28,625 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:28,625 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 20:04:28,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:28,839 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1839013324, now seen corresponding path program 1 times [2019-10-13 20:04:28,841 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:28,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880779433] [2019-10-13 20:04:28,841 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:28,842 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:28,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:28,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:04:29,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880779433] [2019-10-13 20:04:29,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224387007] [2019-10-13 20:04:29,114 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 20:04:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:29,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:04:29,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 20:04:29,408 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:04:29,544 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:04:29,544 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:04:29,544 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314568771] [2019-10-13 20:04:29,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:04:29,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:29,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:04:29,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:04:29,547 INFO L87 Difference]: Start difference. First operand 3350 states and 4400 transitions. Second operand 5 states. [2019-10-13 20:04:31,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:31,475 INFO L93 Difference]: Finished difference Result 7359 states and 9840 transitions. [2019-10-13 20:04:31,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:04:31,477 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 228 [2019-10-13 20:04:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:31,502 INFO L225 Difference]: With dead ends: 7359 [2019-10-13 20:04:31,503 INFO L226 Difference]: Without dead ends: 4015 [2019-10-13 20:04:31,515 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 452 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:04:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2019-10-13 20:04:31,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 3962. [2019-10-13 20:04:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3962 states. [2019-10-13 20:04:31,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3962 states to 3962 states and 5038 transitions. [2019-10-13 20:04:31,642 INFO L78 Accepts]: Start accepts. Automaton has 3962 states and 5038 transitions. Word has length 228 [2019-10-13 20:04:31,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:31,642 INFO L462 AbstractCegarLoop]: Abstraction has 3962 states and 5038 transitions. [2019-10-13 20:04:31,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:04:31,643 INFO L276 IsEmpty]: Start isEmpty. Operand 3962 states and 5038 transitions. [2019-10-13 20:04:31,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-13 20:04:31,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:31,649 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 20:04:31,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:31,862 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:31,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:31,863 INFO L82 PathProgramCache]: Analyzing trace with hash 516745845, now seen corresponding path program 1 times [2019-10-13 20:04:31,863 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:31,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147971501] [2019-10-13 20:04:31,864 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:31,864 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:31,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-13 20:04:32,092 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147971501] [2019-10-13 20:04:32,092 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:32,092 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:04:32,092 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50640685] [2019-10-13 20:04:32,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:04:32,094 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:32,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:04:32,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:04:32,095 INFO L87 Difference]: Start difference. First operand 3962 states and 5038 transitions. Second operand 3 states. [2019-10-13 20:04:33,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:33,265 INFO L93 Difference]: Finished difference Result 8309 states and 10883 transitions. [2019-10-13 20:04:33,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:04:33,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2019-10-13 20:04:33,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:33,292 INFO L225 Difference]: With dead ends: 8309 [2019-10-13 20:04:33,293 INFO L226 Difference]: Without dead ends: 4541 [2019-10-13 20:04:33,305 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 20:04:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4541 states. [2019-10-13 20:04:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4541 to 4539. [2019-10-13 20:04:33,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4539 states. [2019-10-13 20:04:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 5828 transitions. [2019-10-13 20:04:33,418 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 5828 transitions. Word has length 237 [2019-10-13 20:04:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:33,419 INFO L462 AbstractCegarLoop]: Abstraction has 4539 states and 5828 transitions. [2019-10-13 20:04:33,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:04:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 5828 transitions. [2019-10-13 20:04:33,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-10-13 20:04:33,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:33,425 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 20:04:33,425 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:33,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:33,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1474293502, now seen corresponding path program 1 times [2019-10-13 20:04:33,426 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:33,426 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307264196] [2019-10-13 20:04:33,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:33,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:33,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-10-13 20:04:33,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307264196] [2019-10-13 20:04:33,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866815254] [2019-10-13 20:04:33,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:04:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:33,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 20:04:33,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:33,921 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:04:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:34,008 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:34,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:04:34,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,299 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,304 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,316 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:04:34,319 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,321 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,352 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:04:34,898 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 17 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:34,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [290176847] [2019-10-13 20:04:34,904 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 241 [2019-10-13 20:04:34,958 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:04:34,959 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)