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/Problem14_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:48,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:48,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:48,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:07:48,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:07:48,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:07:48,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:07:48,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:07:48,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:07:48,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:07:48,446 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:07:48,447 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:07:48,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:48,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:48,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:48,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:48,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:48,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:48,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:48,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:48,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:48,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:48,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:48,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:48,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:07:48,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:07:48,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:07:48,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:07:48,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:07:48,477 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:07:48,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:07:48,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:07:48,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:07:48,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:48,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:48,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:48,481 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 20:07:48,506 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:48,506 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:48,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:48,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:48,509 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:48,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:48,510 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:48,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:48,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:48,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:48,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:48,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:48,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:48,511 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:48,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:48,511 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:48,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:48,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:48,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:48,512 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:48,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:48,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:48,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:48,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:48,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:48,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:48,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:48,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:48,514 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 20:07:48,789 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:48,807 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:48,811 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:48,812 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:48,813 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:48,813 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label52.c [2019-10-13 20:07:48,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a697def/cce1fb2c5ebf4b7bb8b99fb4f019d739/FLAG1ff6b65f8 [2019-10-13 20:07:49,516 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:49,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label52.c [2019-10-13 20:07:49,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a697def/cce1fb2c5ebf4b7bb8b99fb4f019d739/FLAG1ff6b65f8 [2019-10-13 20:07:49,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a697def/cce1fb2c5ebf4b7bb8b99fb4f019d739 [2019-10-13 20:07:49,770 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:49,772 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:49,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:49,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:49,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:49,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:49" (1/1) ... [2019-10-13 20:07:49,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70034afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:49, skipping insertion in model container [2019-10-13 20:07:49,780 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:49" (1/1) ... [2019-10-13 20:07:49,788 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:49,859 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:50,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:50,424 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:50,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:50,622 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:50,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:50 WrapperNode [2019-10-13 20:07:50,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:50,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:50,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:50,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:50,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:50" (1/1) ... [2019-10-13 20:07:50,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:50" (1/1) ... [2019-10-13 20:07:50,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:50" (1/1) ... [2019-10-13 20:07:50,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:50" (1/1) ... [2019-10-13 20:07:50,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:50" (1/1) ... [2019-10-13 20:07:50,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:50" (1/1) ... [2019-10-13 20:07:50,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:50" (1/1) ... [2019-10-13 20:07:50,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:50,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:50,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:50,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:50,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:50" (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 20:07:50,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:50,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:50,835 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:50,835 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:50,835 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:50,836 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:50,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:50,837 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:50,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:50,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:50,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:52,312 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:52,312 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:52,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:52 BoogieIcfgContainer [2019-10-13 20:07:52,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:52,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:52,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:52,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:52,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:49" (1/3) ... [2019-10-13 20:07:52,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac1c8ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:52, skipping insertion in model container [2019-10-13 20:07:52,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:50" (2/3) ... [2019-10-13 20:07:52,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ac1c8ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:52, skipping insertion in model container [2019-10-13 20:07:52,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:52" (3/3) ... [2019-10-13 20:07:52,323 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label52.c [2019-10-13 20:07:52,334 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:52,343 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:52,355 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:52,399 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:52,400 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:52,401 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:52,402 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:52,402 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:52,402 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:52,402 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:52,403 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:52,436 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:52,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 20:07:52,445 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:52,446 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] [2019-10-13 20:07:52,449 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:52,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:52,458 INFO L82 PathProgramCache]: Analyzing trace with hash -2120821501, now seen corresponding path program 1 times [2019-10-13 20:07:52,468 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:52,468 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102075478] [2019-10-13 20:07:52,469 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:52,469 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:52,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:52,834 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 20:07:52,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102075478] [2019-10-13 20:07:52,836 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:52,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:07:52,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115222899] [2019-10-13 20:07:52,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:07:52,845 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:52,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:07:52,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:52,864 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-13 20:07:54,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:54,128 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-13 20:07:54,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:07:54,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2019-10-13 20:07:54,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:54,166 INFO L225 Difference]: With dead ends: 688 [2019-10-13 20:07:54,167 INFO L226 Difference]: Without dead ends: 372 [2019-10-13 20:07:54,176 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 [2019-10-13 20:07:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-13 20:07:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-13 20:07:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:07:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-13 20:07:54,280 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 28 [2019-10-13 20:07:54,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:54,281 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-13 20:07:54,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:07:54,281 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-13 20:07:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-13 20:07:54,286 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:54,287 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, 1, 1] [2019-10-13 20:07:54,287 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:54,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:54,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1199804154, now seen corresponding path program 1 times [2019-10-13 20:07:54,288 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:54,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468241264] [2019-10-13 20:07:54,288 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:54,289 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:54,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:54,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:54,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468241264] [2019-10-13 20:07:54,562 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:54,563 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:07:54,563 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146648489] [2019-10-13 20:07:54,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:07:54,565 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:54,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:07:54,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:07:54,566 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-13 20:07:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:55,815 INFO L93 Difference]: Finished difference Result 936 states and 1526 transitions. [2019-10-13 20:07:55,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:07:55,815 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2019-10-13 20:07:55,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:55,821 INFO L225 Difference]: With dead ends: 936 [2019-10-13 20:07:55,821 INFO L226 Difference]: Without dead ends: 570 [2019-10-13 20:07:55,823 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 20:07:55,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-10-13 20:07:55,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-10-13 20:07:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-10-13 20:07:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-10-13 20:07:55,888 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 114 [2019-10-13 20:07:55,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:55,889 INFO L462 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-10-13 20:07:55,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:07:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-10-13 20:07:55,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 20:07:55,893 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:55,893 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:55,894 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:55,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:55,894 INFO L82 PathProgramCache]: Analyzing trace with hash 217144121, now seen corresponding path program 1 times [2019-10-13 20:07:55,895 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:55,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689671744] [2019-10-13 20:07:55,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:55,896 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:55,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:55,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:56,049 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689671744] [2019-10-13 20:07:56,050 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:56,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:56,050 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889594050] [2019-10-13 20:07:56,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:56,051 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:56,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:56,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:56,052 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-10-13 20:07:57,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:57,638 INFO L93 Difference]: Finished difference Result 2220 states and 3292 transitions. [2019-10-13 20:07:57,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:57,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 123 [2019-10-13 20:07:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:57,649 INFO L225 Difference]: With dead ends: 2220 [2019-10-13 20:07:57,650 INFO L226 Difference]: Without dead ends: 1664 [2019-10-13 20:07:57,652 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 20:07:57,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-10-13 20:07:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1664. [2019-10-13 20:07:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1664 states. [2019-10-13 20:07:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2287 transitions. [2019-10-13 20:07:57,712 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2287 transitions. Word has length 123 [2019-10-13 20:07:57,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:57,713 INFO L462 AbstractCegarLoop]: Abstraction has 1664 states and 2287 transitions. [2019-10-13 20:07:57,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:57,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2287 transitions. [2019-10-13 20:07:57,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2019-10-13 20:07:57,722 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:57,723 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:07:57,723 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:57,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:57,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1603017994, now seen corresponding path program 1 times [2019-10-13 20:07:57,724 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:57,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408783443] [2019-10-13 20:07:57,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:57,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:57,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:58,050 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 133 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:58,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408783443] [2019-10-13 20:07:58,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177487965] [2019-10-13 20:07:58,051 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 20:07:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:58,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:07:58,168 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:58,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:58,448 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 20:07:58,449 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:58,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:58,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:58,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:58,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:58,653 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:58,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:58,956 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 42 proven. 107 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:58,956 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:07:58,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2019-10-13 20:07:58,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016560042] [2019-10-13 20:07:58,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:07:58,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:58,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:07:58,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:07:58,959 INFO L87 Difference]: Start difference. First operand 1664 states and 2287 transitions. Second operand 5 states. [2019-10-13 20:08:00,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:00,453 INFO L93 Difference]: Finished difference Result 3726 states and 5163 transitions. [2019-10-13 20:08:00,453 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:08:00,454 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 251 [2019-10-13 20:08:00,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:00,464 INFO L225 Difference]: With dead ends: 3726 [2019-10-13 20:08:00,465 INFO L226 Difference]: Without dead ends: 2068 [2019-10-13 20:08:00,468 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 498 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-10-13 20:08:00,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2019-10-13 20:08:00,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1690. [2019-10-13 20:08:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1690 states. [2019-10-13 20:08:00,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2313 transitions. [2019-10-13 20:08:00,530 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2313 transitions. Word has length 251 [2019-10-13 20:08:00,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:00,530 INFO L462 AbstractCegarLoop]: Abstraction has 1690 states and 2313 transitions. [2019-10-13 20:08:00,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:08:00,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2313 transitions. [2019-10-13 20:08:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2019-10-13 20:08:00,539 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:00,539 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:08:00,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:08:00,744 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:00,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:00,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1140395773, now seen corresponding path program 1 times [2019-10-13 20:08:00,745 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:00,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806722391] [2019-10-13 20:08:00,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:00,746 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:00,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 149 proven. 189 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:08:01,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806722391] [2019-10-13 20:08:01,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556918266] [2019-10-13 20:08:01,778 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 20:08:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:01,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:08:01,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:01,952 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:08:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 267 proven. 53 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 20:08:02,162 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:02,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:08:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 71 proven. 267 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:08:02,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1789884310] [2019-10-13 20:08:02,760 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 336 [2019-10-13 20:08:02,825 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:08:02,825 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:08:15,059 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:08:15,062 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 485 root evaluator evaluations with a maximum evaluation depth of 13. Performed 485 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-13 20:08:15,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:15,067 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:08:20,730 INFO L227 lantSequenceWeakener]: Weakened 332 states. On average, predicates are now at 77.43% of their original sizes. [2019-10-13 20:08:20,730 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:08:20,815 INFO L553 sIntCurrentIteration]: We unified 334 AI predicates to 334 [2019-10-13 20:08:20,815 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:08:20,816 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:08:20,816 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 8, 8] total 29 [2019-10-13 20:08:20,817 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572749260] [2019-10-13 20:08:20,818 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 20:08:20,819 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:20,819 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:08:20,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 20:08:20,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:08:20,820 INFO L87 Difference]: Start difference. First operand 1690 states and 2313 transitions. Second operand 11 states.