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/Problem02_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:57:28,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:57:28,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:57:28,163 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:57:28,164 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:57:28,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:57:28,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:57:28,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:57:28,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:57:28,170 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:57:28,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:57:28,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:57:28,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:57:28,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:57:28,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:57:28,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:57:28,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:57:28,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:57:28,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:57:28,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:57:28,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:57:28,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:57:28,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:57:28,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:57:28,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:57:28,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:57:28,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:57:28,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:57:28,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:57:28,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:57:28,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:57:28,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:57:28,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:57:28,196 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:57:28,197 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:57:28,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:57:28,199 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 [2019-10-14 23:57:28,213 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:57:28,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:57:28,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:57:28,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:57:28,215 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:57:28,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:57:28,215 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:57:28,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:57:28,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:57:28,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:57:28,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:57:28,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:57:28,216 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:57:28,217 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:57:28,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:57:28,217 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:57:28,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:57:28,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:57:28,218 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:57:28,218 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:57:28,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:57:28,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:57:28,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:57:28,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:57:28,219 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:57:28,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:57:28,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:57:28,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:57:28,220 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 [2019-10-14 23:57:28,522 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:57:28,541 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:57:28,545 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:57:28,547 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:57:28,547 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:57:28,548 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label45.c [2019-10-14 23:57:28,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ab02a781/84871a42ba7b49c9b51666637985ee58/FLAGd87e8dc3d [2019-10-14 23:57:29,247 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:57:29,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label45.c [2019-10-14 23:57:29,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ab02a781/84871a42ba7b49c9b51666637985ee58/FLAGd87e8dc3d [2019-10-14 23:57:29,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ab02a781/84871a42ba7b49c9b51666637985ee58 [2019-10-14 23:57:29,503 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:57:29,505 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:57:29,506 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:57:29,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:57:29,510 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:57:29,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:29" (1/1) ... [2019-10-14 23:57:29,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3675282d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:29, skipping insertion in model container [2019-10-14 23:57:29,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:29" (1/1) ... [2019-10-14 23:57:29,522 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:57:29,579 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:57:30,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:57:30,117 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:57:30,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:57:30,282 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:57:30,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:30 WrapperNode [2019-10-14 23:57:30,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:57:30,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:57:30,284 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:57:30,284 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:57:30,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:30" (1/1) ... [2019-10-14 23:57:30,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:30" (1/1) ... [2019-10-14 23:57:30,317 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:30" (1/1) ... [2019-10-14 23:57:30,318 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:30" (1/1) ... [2019-10-14 23:57:30,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:30" (1/1) ... [2019-10-14 23:57:30,375 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:30" (1/1) ... [2019-10-14 23:57:30,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:30" (1/1) ... [2019-10-14 23:57:30,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:57:30,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:57:30,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:57:30,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:57:30,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:30" (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 [2019-10-14 23:57:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:57:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:57:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:57:30,455 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:57:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:57:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:57:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:57:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:57:30,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:57:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:57:30,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:57:31,758 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:57:31,759 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:57:31,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:31 BoogieIcfgContainer [2019-10-14 23:57:31,760 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:57:31,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:57:31,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:57:31,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:57:31,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:57:29" (1/3) ... [2019-10-14 23:57:31,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6773acf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:31, skipping insertion in model container [2019-10-14 23:57:31,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:30" (2/3) ... [2019-10-14 23:57:31,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6773acf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:31, skipping insertion in model container [2019-10-14 23:57:31,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:31" (3/3) ... [2019-10-14 23:57:31,780 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label45.c [2019-10-14 23:57:31,796 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:57:31,807 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:57:31,822 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:57:31,858 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:57:31,858 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:57:31,858 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:57:31,859 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:57:31,859 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:57:31,859 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:57:31,859 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:57:31,860 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:57:31,891 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:57:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-14 23:57:31,904 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:31,905 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:57:31,907 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:31,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:31,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1702778474, now seen corresponding path program 1 times [2019-10-14 23:57:31,928 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:31,928 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789606548] [2019-10-14 23:57:31,929 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:31,929 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:31,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:32,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789606548] [2019-10-14 23:57:32,425 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:32,426 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:57:32,426 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837815226] [2019-10-14 23:57:32,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:57:32,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:32,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:57:32,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:57:32,454 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:57:33,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:33,446 INFO L93 Difference]: Finished difference Result 618 states and 1056 transitions. [2019-10-14 23:57:33,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:57:33,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-10-14 23:57:33,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:33,483 INFO L225 Difference]: With dead ends: 618 [2019-10-14 23:57:33,483 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:57:33,498 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:57:33,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:57:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2019-10-14 23:57:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-14 23:57:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 465 transitions. [2019-10-14 23:57:33,586 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 465 transitions. Word has length 88 [2019-10-14 23:57:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:33,587 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 465 transitions. [2019-10-14 23:57:33,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:57:33,588 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 465 transitions. [2019-10-14 23:57:33,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 23:57:33,593 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:33,593 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:57:33,594 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:33,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:33,594 INFO L82 PathProgramCache]: Analyzing trace with hash 302411185, now seen corresponding path program 1 times [2019-10-14 23:57:33,595 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:33,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382796745] [2019-10-14 23:57:33,595 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:33,595 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:33,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:33,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:33,777 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382796745] [2019-10-14 23:57:33,777 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:33,778 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:57:33,778 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362980457] [2019-10-14 23:57:33,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:57:33,780 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:33,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:57:33,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:57:33,781 INFO L87 Difference]: Start difference. First operand 320 states and 465 transitions. Second operand 4 states. [2019-10-14 23:57:34,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:34,849 INFO L93 Difference]: Finished difference Result 1216 states and 1816 transitions. [2019-10-14 23:57:34,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:57:34,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2019-10-14 23:57:34,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:34,863 INFO L225 Difference]: With dead ends: 1216 [2019-10-14 23:57:34,863 INFO L226 Difference]: Without dead ends: 902 [2019-10-14 23:57:34,865 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 [2019-10-14 23:57:34,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2019-10-14 23:57:34,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 899. [2019-10-14 23:57:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2019-10-14 23:57:34,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1231 transitions. [2019-10-14 23:57:34,930 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1231 transitions. Word has length 96 [2019-10-14 23:57:34,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:34,931 INFO L462 AbstractCegarLoop]: Abstraction has 899 states and 1231 transitions. [2019-10-14 23:57:34,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:57:34,932 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1231 transitions. [2019-10-14 23:57:34,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 23:57:34,938 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:34,938 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:57:34,939 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:34,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:34,939 INFO L82 PathProgramCache]: Analyzing trace with hash 574467246, now seen corresponding path program 1 times [2019-10-14 23:57:34,939 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:34,940 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143227369] [2019-10-14 23:57:34,940 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:34,940 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:34,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:35,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143227369] [2019-10-14 23:57:35,114 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:35,114 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:57:35,115 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048116193] [2019-10-14 23:57:35,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:57:35,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:35,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:57:35,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:57:35,119 INFO L87 Difference]: Start difference. First operand 899 states and 1231 transitions. Second operand 6 states. [2019-10-14 23:57:36,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:36,220 INFO L93 Difference]: Finished difference Result 2122 states and 3001 transitions. [2019-10-14 23:57:36,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:57:36,222 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2019-10-14 23:57:36,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:36,231 INFO L225 Difference]: With dead ends: 2122 [2019-10-14 23:57:36,231 INFO L226 Difference]: Without dead ends: 1229 [2019-10-14 23:57:36,234 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 [2019-10-14 23:57:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2019-10-14 23:57:36,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1211. [2019-10-14 23:57:36,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2019-10-14 23:57:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1651 transitions. [2019-10-14 23:57:36,286 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1651 transitions. Word has length 110 [2019-10-14 23:57:36,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:36,287 INFO L462 AbstractCegarLoop]: Abstraction has 1211 states and 1651 transitions. [2019-10-14 23:57:36,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:57:36,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1651 transitions. [2019-10-14 23:57:36,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 23:57:36,294 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:36,294 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:57:36,294 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:36,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:36,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1937402390, now seen corresponding path program 1 times [2019-10-14 23:57:36,295 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:36,296 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141566182] [2019-10-14 23:57:36,296 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:36,296 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:36,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:36,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:36,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141566182] [2019-10-14 23:57:36,454 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:36,454 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:57:36,454 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556113344] [2019-10-14 23:57:36,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:57:36,455 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:36,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:57:36,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:57:36,456 INFO L87 Difference]: Start difference. First operand 1211 states and 1651 transitions. Second operand 6 states. [2019-10-14 23:57:37,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:37,530 INFO L93 Difference]: Finished difference Result 2777 states and 3976 transitions. [2019-10-14 23:57:37,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:57:37,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 112 [2019-10-14 23:57:37,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:37,543 INFO L225 Difference]: With dead ends: 2777 [2019-10-14 23:57:37,543 INFO L226 Difference]: Without dead ends: 1572 [2019-10-14 23:57:37,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:57:37,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2019-10-14 23:57:37,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1539. [2019-10-14 23:57:37,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1539 states. [2019-10-14 23:57:37,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 1952 transitions. [2019-10-14 23:57:37,616 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 1952 transitions. Word has length 112 [2019-10-14 23:57:37,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:37,616 INFO L462 AbstractCegarLoop]: Abstraction has 1539 states and 1952 transitions. [2019-10-14 23:57:37,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:57:37,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 1952 transitions. [2019-10-14 23:57:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 23:57:37,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:37,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:57:37,625 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1854304108, now seen corresponding path program 1 times [2019-10-14 23:57:37,626 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:37,627 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459532542] [2019-10-14 23:57:37,627 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:37,627 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:37,627 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:37,789 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459532542] [2019-10-14 23:57:37,789 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:37,789 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:57:37,789 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521462596] [2019-10-14 23:57:37,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:57:37,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:37,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:57:37,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:57:37,791 INFO L87 Difference]: Start difference. First operand 1539 states and 1952 transitions. Second operand 6 states. [2019-10-14 23:57:38,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:38,687 INFO L93 Difference]: Finished difference Result 4306 states and 5773 transitions. [2019-10-14 23:57:38,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:57:38,688 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2019-10-14 23:57:38,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:38,708 INFO L225 Difference]: With dead ends: 4306 [2019-10-14 23:57:38,708 INFO L226 Difference]: Without dead ends: 2773 [2019-10-14 23:57:38,714 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 [2019-10-14 23:57:38,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2773 states. [2019-10-14 23:57:38,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2773 to 2733. [2019-10-14 23:57:38,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2733 states. [2019-10-14 23:57:38,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2733 states to 2733 states and 3336 transitions. [2019-10-14 23:57:38,809 INFO L78 Accepts]: Start accepts. Automaton has 2733 states and 3336 transitions. Word has length 119 [2019-10-14 23:57:38,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:38,810 INFO L462 AbstractCegarLoop]: Abstraction has 2733 states and 3336 transitions. [2019-10-14 23:57:38,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:57:38,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2733 states and 3336 transitions. [2019-10-14 23:57:38,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-14 23:57:38,816 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:38,817 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:57:38,817 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2014345303, now seen corresponding path program 1 times [2019-10-14 23:57:38,818 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:38,818 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698865140] [2019-10-14 23:57:38,818 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:38,819 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:38,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:38,949 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:38,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698865140] [2019-10-14 23:57:38,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515315200] [2019-10-14 23:57:38,950 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 [2019-10-14 23:57:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:39,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:57:39,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:57:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:57:39,222 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:57:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:57:39,314 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:57:39,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 9 [2019-10-14 23:57:39,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032856476] [2019-10-14 23:57:39,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:57:39,317 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:39,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:57:39,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:57:39,318 INFO L87 Difference]: Start difference. First operand 2733 states and 3336 transitions. Second operand 3 states. [2019-10-14 23:57:40,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:40,067 INFO L93 Difference]: Finished difference Result 6474 states and 7925 transitions. [2019-10-14 23:57:40,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:57:40,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2019-10-14 23:57:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:40,082 INFO L225 Difference]: With dead ends: 6474 [2019-10-14 23:57:40,082 INFO L226 Difference]: Without dead ends: 2419 [2019-10-14 23:57:40,096 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 248 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:57:40,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2019-10-14 23:57:40,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 2417. [2019-10-14 23:57:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2417 states. [2019-10-14 23:57:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 2835 transitions. [2019-10-14 23:57:40,188 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 2835 transitions. Word has length 123 [2019-10-14 23:57:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:40,190 INFO L462 AbstractCegarLoop]: Abstraction has 2417 states and 2835 transitions. [2019-10-14 23:57:40,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:57:40,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 2835 transitions. [2019-10-14 23:57:40,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-14 23:57:40,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:40,197 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:57:40,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:57:40,412 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:40,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:40,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1340427713, now seen corresponding path program 1 times [2019-10-14 23:57:40,412 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:40,415 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669574907] [2019-10-14 23:57:40,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:40,416 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:40,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:40,551 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 23:57:40,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669574907] [2019-10-14 23:57:40,552 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024024215] [2019-10-14 23:57:40,553 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 [2019-10-14 23:57:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:40,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:57:40,686 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:57:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-14 23:57:40,741 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:57:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 23:57:40,878 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1012294877] [2019-10-14 23:57:40,886 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 161 [2019-10-14 23:57:40,953 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:57:40,953 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)