java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:09:46,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:09:46,261 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:09:46,280 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:09:46,281 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:09:46,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:09:46,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:09:46,299 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:09:46,301 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:09:46,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:09:46,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:09:46,307 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:09:46,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:09:46,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:09:46,314 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:09:46,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:09:46,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:09:46,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:09:46,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:09:46,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:09:46,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:09:46,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:09:46,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:09:46,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:09:46,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:09:46,350 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:09:46,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:09:46,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:09:46,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:09:46,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:09:46,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:09:46,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:09:46,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:09:46,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:09:46,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:09:46,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:09:46,362 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 20:09:46,382 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:09:46,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:09:46,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:09:46,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:09:46,385 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:09:46,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:09:46,385 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:09:46,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:09:46,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:09:46,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:09:46,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:09:46,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:09:46,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:09:46,387 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:09:46,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:09:46,387 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:09:46,387 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:09:46,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:09:46,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:09:46,388 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:09:46,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:09:46,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:09:46,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:09:46,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:09:46,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:09:46,389 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:09:46,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:09:46,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:09:46,390 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 20:09:46,686 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:09:46,700 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:09:46,704 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:09:46,705 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:09:46,706 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:09:46,706 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label29.c [2019-10-13 20:09:46,783 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ffdfb85/349cbcbaed8d4947a2226be09148b11d/FLAG433261c82 [2019-10-13 20:09:47,510 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:09:47,513 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label29.c [2019-10-13 20:09:47,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ffdfb85/349cbcbaed8d4947a2226be09148b11d/FLAG433261c82 [2019-10-13 20:09:47,664 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09ffdfb85/349cbcbaed8d4947a2226be09148b11d [2019-10-13 20:09:47,675 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:09:47,677 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:09:47,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:47,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:09:47,682 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:09:47,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:47" (1/1) ... [2019-10-13 20:09:47,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a1e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:47, skipping insertion in model container [2019-10-13 20:09:47,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:47" (1/1) ... [2019-10-13 20:09:47,693 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:09:47,784 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:09:48,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:48,656 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:09:49,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:09:49,257 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:09:49,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:49 WrapperNode [2019-10-13 20:09:49,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:09:49,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:09:49,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:09:49,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:09:49,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:49" (1/1) ... [2019-10-13 20:09:49,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:49" (1/1) ... [2019-10-13 20:09:49,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:49" (1/1) ... [2019-10-13 20:09:49,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:49" (1/1) ... [2019-10-13 20:09:49,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:49" (1/1) ... [2019-10-13 20:09:49,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:49" (1/1) ... [2019-10-13 20:09:49,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:49" (1/1) ... [2019-10-13 20:09:49,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:09:49,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:09:49,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:09:49,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:09:49,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:49" (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 20:09:49,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:09:49,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:09:49,492 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:09:49,493 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:09:49,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:09:49,493 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:09:49,493 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:09:49,493 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:09:49,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:09:49,494 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:09:49,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:09:49,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:09:49,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:09:51,934 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:09:51,934 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:09:51,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:51 BoogieIcfgContainer [2019-10-13 20:09:51,936 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:09:51,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:09:51,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:09:51,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:09:51,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:09:47" (1/3) ... [2019-10-13 20:09:51,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3083da3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:51, skipping insertion in model container [2019-10-13 20:09:51,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:49" (2/3) ... [2019-10-13 20:09:51,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3083da3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:51, skipping insertion in model container [2019-10-13 20:09:51,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:51" (3/3) ... [2019-10-13 20:09:51,944 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label29.c [2019-10-13 20:09:51,954 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:09:51,964 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:09:51,981 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:09:52,024 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:09:52,024 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:09:52,025 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:09:52,025 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:09:52,025 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:09:52,025 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:09:52,026 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:09:52,026 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:09:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 20:09:52,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 20:09:52,088 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:52,090 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] [2019-10-13 20:09:52,092 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:52,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1301398987, now seen corresponding path program 1 times [2019-10-13 20:09:52,114 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:52,114 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583188341] [2019-10-13 20:09:52,115 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:52,115 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:52,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:52,593 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 20:09:52,594 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583188341] [2019-10-13 20:09:52,595 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:52,595 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:09:52,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053893694] [2019-10-13 20:09:52,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:09:52,604 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:09:52,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:09:52,624 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-13 20:09:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:55,104 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-13 20:09:55,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:09:55,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2019-10-13 20:09:55,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:55,129 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 20:09:55,129 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 20:09:55,139 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 20:09:55,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 20:09:55,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 20:09:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 20:09:55,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1166 transitions. [2019-10-13 20:09:55,256 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1166 transitions. Word has length 52 [2019-10-13 20:09:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:55,257 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1166 transitions. [2019-10-13 20:09:55,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:09:55,259 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1166 transitions. [2019-10-13 20:09:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-13 20:09:55,272 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:55,273 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:09:55,274 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:55,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:55,275 INFO L82 PathProgramCache]: Analyzing trace with hash -740813347, now seen corresponding path program 1 times [2019-10-13 20:09:55,275 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:55,276 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851513363] [2019-10-13 20:09:55,276 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:55,276 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:55,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:55,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:55,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851513363] [2019-10-13 20:09:55,554 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:55,555 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:55,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943072940] [2019-10-13 20:09:55,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:55,557 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:55,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:55,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:55,558 INFO L87 Difference]: Start difference. First operand 682 states and 1166 transitions. Second operand 6 states. [2019-10-13 20:09:58,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:58,306 INFO L93 Difference]: Finished difference Result 1733 states and 2953 transitions. [2019-10-13 20:09:58,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:09:58,307 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-10-13 20:09:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:58,318 INFO L225 Difference]: With dead ends: 1733 [2019-10-13 20:09:58,318 INFO L226 Difference]: Without dead ends: 1057 [2019-10-13 20:09:58,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:09:58,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-10-13 20:09:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1039. [2019-10-13 20:09:58,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-10-13 20:09:58,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1701 transitions. [2019-10-13 20:09:58,374 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1701 transitions. Word has length 159 [2019-10-13 20:09:58,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:58,375 INFO L462 AbstractCegarLoop]: Abstraction has 1039 states and 1701 transitions. [2019-10-13 20:09:58,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:58,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1701 transitions. [2019-10-13 20:09:58,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-13 20:09:58,379 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:58,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:09:58,380 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:58,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:58,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1072071420, now seen corresponding path program 1 times [2019-10-13 20:09:58,381 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:58,381 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138331117] [2019-10-13 20:09:58,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:58,381 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:58,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:58,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138331117] [2019-10-13 20:09:58,586 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:58,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:09:58,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288202987] [2019-10-13 20:09:58,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:58,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:58,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:58,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:09:58,588 INFO L87 Difference]: Start difference. First operand 1039 states and 1701 transitions. Second operand 6 states. [2019-10-13 20:10:01,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:01,364 INFO L93 Difference]: Finished difference Result 3130 states and 5158 transitions. [2019-10-13 20:10:01,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:01,365 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 162 [2019-10-13 20:10:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:01,383 INFO L225 Difference]: With dead ends: 3130 [2019-10-13 20:10:01,392 INFO L226 Difference]: Without dead ends: 2097 [2019-10-13 20:10:01,397 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:10:01,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2019-10-13 20:10:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 2081. [2019-10-13 20:10:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-10-13 20:10:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3125 transitions. [2019-10-13 20:10:01,473 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3125 transitions. Word has length 162 [2019-10-13 20:10:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:01,474 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3125 transitions. [2019-10-13 20:10:01,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:10:01,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3125 transitions. [2019-10-13 20:10:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2019-10-13 20:10:01,485 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:01,486 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:10:01,487 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:01,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1495259620, now seen corresponding path program 1 times [2019-10-13 20:10:01,488 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:01,488 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321738672] [2019-10-13 20:10:01,488 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:01,488 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:01,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 90 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:10:01,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321738672] [2019-10-13 20:10:01,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261086053] [2019-10-13 20:10:01,918 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 20:10:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:02,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:10:02,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 20:10:02,333 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 90 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:10:02,584 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:10:02,585 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:10:02,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555089213] [2019-10-13 20:10:02,586 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:10:02,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:02,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:10:02,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:10:02,589 INFO L87 Difference]: Start difference. First operand 2081 states and 3125 transitions. Second operand 5 states. [2019-10-13 20:10:05,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:05,461 INFO L93 Difference]: Finished difference Result 6247 states and 9508 transitions. [2019-10-13 20:10:05,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:05,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 277 [2019-10-13 20:10:05,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:05,484 INFO L225 Difference]: With dead ends: 6247 [2019-10-13 20:10:05,484 INFO L226 Difference]: Without dead ends: 4172 [2019-10-13 20:10:05,490 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 549 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:10:05,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2019-10-13 20:10:05,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3821. [2019-10-13 20:10:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3821 states. [2019-10-13 20:10:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3821 states to 3821 states and 5206 transitions. [2019-10-13 20:10:05,603 INFO L78 Accepts]: Start accepts. Automaton has 3821 states and 5206 transitions. Word has length 277 [2019-10-13 20:10:05,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:05,604 INFO L462 AbstractCegarLoop]: Abstraction has 3821 states and 5206 transitions. [2019-10-13 20:10:05,604 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:10:05,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3821 states and 5206 transitions. [2019-10-13 20:10:05,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2019-10-13 20:10:05,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:05,616 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 20:10:05,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:05,822 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:05,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1133470175, now seen corresponding path program 1 times [2019-10-13 20:10:05,823 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:05,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106776885] [2019-10-13 20:10:05,824 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:05,824 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:05,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 140 proven. 240 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 20:10:06,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106776885] [2019-10-13 20:10:06,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582817141] [2019-10-13 20:10:06,232 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 20:10:06,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:06,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:10:06,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 402 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-10-13 20:10:06,636 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:06,910 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 237 proven. 115 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-10-13 20:10:06,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1608084061] [2019-10-13 20:10:06,917 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 486 [2019-10-13 20:10:06,974 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:10:06,974 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:10:22,315 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:10:22,317 INFO L272 AbstractInterpreter]: Visited 224 different actions 224 times. Never merged. Never widened. Performed 422 root evaluator evaluations with a maximum evaluation depth of 14. Performed 422 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-13 20:10:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:22,321 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates