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_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:03:30,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:03:30,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:03:30,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:03:30,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:03:30,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:03:30,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:03:30,485 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:03:30,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:03:30,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:03:30,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:03:30,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:03:30,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:03:30,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:03:30,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:03:30,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:03:30,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:03:30,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:03:30,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:03:30,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:03:30,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:03:30,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:03:30,519 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:03:30,520 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:03:30,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:03:30,527 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:03:30,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:03:30,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:03:30,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:03:30,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:03:30,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:03:30,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:03:30,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:03:30,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:03:30,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:03:30,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:03:30,534 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 20:03:30,566 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:03:30,567 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:03:30,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:03:30,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:03:30,570 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:03:30,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:03:30,571 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:03:30,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:03:30,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:03:30,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:03:30,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:03:30,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:03:30,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:03:30,574 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:03:30,574 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:03:30,575 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:03:30,575 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:03:30,575 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:03:30,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:03:30,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:03:30,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:03:30,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:03:30,578 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:03:30,578 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:03:30,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:03:30,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:03:30,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:03:30,579 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:03:30,579 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 20:03:30,856 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:03:30,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:03:30,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:03:30,876 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:03:30,876 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:03:30,877 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label01.c [2019-10-13 20:03:30,936 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96c9dba3a/b07834d778d94b83a958801e0542843b/FLAG0e73202c1 [2019-10-13 20:03:31,579 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:03:31,580 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label01.c [2019-10-13 20:03:31,593 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96c9dba3a/b07834d778d94b83a958801e0542843b/FLAG0e73202c1 [2019-10-13 20:03:31,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96c9dba3a/b07834d778d94b83a958801e0542843b [2019-10-13 20:03:31,801 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:03:31,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:03:31,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:31,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:03:31,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:03:31,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:31" (1/1) ... [2019-10-13 20:03:31,816 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c8a10c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:31, skipping insertion in model container [2019-10-13 20:03:31,816 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:31" (1/1) ... [2019-10-13 20:03:31,824 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:03:31,883 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:03:32,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:32,542 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:03:32,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:32,787 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:03:32,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:32 WrapperNode [2019-10-13 20:03:32,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:32,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:03:32,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:03:32,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:03:32,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:32" (1/1) ... [2019-10-13 20:03:32,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:32" (1/1) ... [2019-10-13 20:03:32,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:32" (1/1) ... [2019-10-13 20:03:32,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:32" (1/1) ... [2019-10-13 20:03:32,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:32" (1/1) ... [2019-10-13 20:03:32,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:32" (1/1) ... [2019-10-13 20:03:32,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:32" (1/1) ... [2019-10-13 20:03:32,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:03:32,983 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:03:32,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:03:32,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:03:32,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:32" (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 20:03:33,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:03:33,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:03:33,085 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:03:33,086 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:03:33,086 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:03:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:03:33,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:03:33,088 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:03:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:03:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:03:33,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:03:35,159 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:03:35,159 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:03:35,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:35 BoogieIcfgContainer [2019-10-13 20:03:35,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:03:35,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:03:35,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:03:35,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:03:35,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:03:31" (1/3) ... [2019-10-13 20:03:35,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637764d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:35, skipping insertion in model container [2019-10-13 20:03:35,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:32" (2/3) ... [2019-10-13 20:03:35,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@637764d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:35, skipping insertion in model container [2019-10-13 20:03:35,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:35" (3/3) ... [2019-10-13 20:03:35,170 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label01.c [2019-10-13 20:03:35,180 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:03:35,188 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:03:35,200 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:03:35,226 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:03:35,226 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:03:35,226 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:03:35,227 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:03:35,227 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:03:35,227 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:03:35,227 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:03:35,227 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:03:35,263 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:03:35,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 20:03:35,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:35,272 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] [2019-10-13 20:03:35,274 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:35,279 INFO L82 PathProgramCache]: Analyzing trace with hash 155474906, now seen corresponding path program 1 times [2019-10-13 20:03:35,286 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:35,286 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845549609] [2019-10-13 20:03:35,286 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:35,287 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:35,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:35,648 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 20:03:35,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845549609] [2019-10-13 20:03:35,650 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:35,651 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:03:35,651 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337057979] [2019-10-13 20:03:35,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:03:35,662 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:35,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:03:35,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:03:35,684 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-13 20:03:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:37,288 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-10-13 20:03:37,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:03:37,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2019-10-13 20:03:37,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:37,315 INFO L225 Difference]: With dead ends: 779 [2019-10-13 20:03:37,315 INFO L226 Difference]: Without dead ends: 425 [2019-10-13 20:03:37,322 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 20:03:37,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-10-13 20:03:37,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-10-13 20:03:37,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-13 20:03:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 672 transitions. [2019-10-13 20:03:37,431 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 672 transitions. Word has length 63 [2019-10-13 20:03:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:37,432 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 672 transitions. [2019-10-13 20:03:37,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:03:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 672 transitions. [2019-10-13 20:03:37,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 20:03:37,440 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:37,440 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 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 20:03:37,440 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:37,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:37,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1591482302, now seen corresponding path program 1 times [2019-10-13 20:03:37,441 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:37,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505453100] [2019-10-13 20:03:37,442 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:37,442 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:37,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:37,795 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:37,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505453100] [2019-10-13 20:03:37,796 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:37,796 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:03:37,796 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310370224] [2019-10-13 20:03:37,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:03:37,799 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:03:37,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:03:37,800 INFO L87 Difference]: Start difference. First operand 420 states and 672 transitions. Second operand 4 states. [2019-10-13 20:03:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:39,907 INFO L93 Difference]: Finished difference Result 1606 states and 2628 transitions. [2019-10-13 20:03:39,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:03:39,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-10-13 20:03:39,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:39,918 INFO L225 Difference]: With dead ends: 1606 [2019-10-13 20:03:39,919 INFO L226 Difference]: Without dead ends: 1192 [2019-10-13 20:03:39,921 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 20:03:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2019-10-13 20:03:39,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1182. [2019-10-13 20:03:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2019-10-13 20:03:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1860 transitions. [2019-10-13 20:03:39,988 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1860 transitions. Word has length 137 [2019-10-13 20:03:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:39,989 INFO L462 AbstractCegarLoop]: Abstraction has 1182 states and 1860 transitions. [2019-10-13 20:03:39,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:03:39,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1860 transitions. [2019-10-13 20:03:40,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-10-13 20:03:40,001 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:40,005 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 20:03:40,006 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:40,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:40,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1307021109, now seen corresponding path program 1 times [2019-10-13 20:03:40,006 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:40,007 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939077404] [2019-10-13 20:03:40,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:40,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:40,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:40,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 112 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:03:40,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939077404] [2019-10-13 20:03:40,315 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337925710] [2019-10-13 20:03:40,315 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 20:03:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:40,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:03:40,433 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-13 20:03:40,576 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 112 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:03:40,735 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:03:40,736 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-10-13 20:03:40,736 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765391169] [2019-10-13 20:03:40,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:03:40,742 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:40,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:03:40,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:03:40,742 INFO L87 Difference]: Start difference. First operand 1182 states and 1860 transitions. Second operand 5 states. [2019-10-13 20:03:42,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:42,429 INFO L93 Difference]: Finished difference Result 2968 states and 4784 transitions. [2019-10-13 20:03:42,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 20:03:42,430 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 226 [2019-10-13 20:03:42,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:42,443 INFO L225 Difference]: With dead ends: 2968 [2019-10-13 20:03:42,444 INFO L226 Difference]: Without dead ends: 1792 [2019-10-13 20:03:42,447 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-10-13 20:03:42,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2019-10-13 20:03:42,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1767. [2019-10-13 20:03:42,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1767 states. [2019-10-13 20:03:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 2729 transitions. [2019-10-13 20:03:42,544 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 2729 transitions. Word has length 226 [2019-10-13 20:03:42,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:42,547 INFO L462 AbstractCegarLoop]: Abstraction has 1767 states and 2729 transitions. [2019-10-13 20:03:42,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:03:42,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 2729 transitions. [2019-10-13 20:03:42,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-13 20:03:42,556 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:42,556 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:03:42,761 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:42,762 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:42,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:42,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2104432712, now seen corresponding path program 1 times [2019-10-13 20:03:42,762 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:42,763 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078869861] [2019-10-13 20:03:42,763 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:42,763 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:42,763 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:42,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078869861] [2019-10-13 20:03:42,981 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:42,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:03:42,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561921136] [2019-10-13 20:03:42,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:03:42,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:42,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:03:42,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:03:42,983 INFO L87 Difference]: Start difference. First operand 1767 states and 2729 transitions. Second operand 6 states. [2019-10-13 20:03:44,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:44,950 INFO L93 Difference]: Finished difference Result 4762 states and 7716 transitions. [2019-10-13 20:03:44,951 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:03:44,951 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 232 [2019-10-13 20:03:44,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:44,972 INFO L225 Difference]: With dead ends: 4762 [2019-10-13 20:03:44,972 INFO L226 Difference]: Without dead ends: 3001 [2019-10-13 20:03:44,979 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:03:44,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2019-10-13 20:03:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2196. [2019-10-13 20:03:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2196 states. [2019-10-13 20:03:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 3362 transitions. [2019-10-13 20:03:45,077 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 3362 transitions. Word has length 232 [2019-10-13 20:03:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:45,078 INFO L462 AbstractCegarLoop]: Abstraction has 2196 states and 3362 transitions. [2019-10-13 20:03:45,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:03:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 3362 transitions. [2019-10-13 20:03:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2019-10-13 20:03:45,085 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:45,086 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2019-10-13 20:03:45,086 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:45,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:45,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1496622101, now seen corresponding path program 1 times [2019-10-13 20:03:45,087 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:45,087 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952281207] [2019-10-13 20:03:45,087 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:45,088 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:45,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:45,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952281207] [2019-10-13 20:03:45,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038402642] [2019-10-13 20:03:45,328 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 20:03:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:45,436 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 20:03:45,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:45,552 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:45,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1726836224] [2019-10-13 20:03:45,728 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 243 [2019-10-13 20:03:45,814 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:03:45,815 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)