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/Problem12_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:04:47,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:04:47,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:04:47,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:04:47,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:04:47,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:04:47,457 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:04:47,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:04:47,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:04:47,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:04:47,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:04:47,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:04:47,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:04:47,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:04:47,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:04:47,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:04:47,487 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:04:47,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:04:47,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:04:47,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:04:47,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:04:47,503 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:04:47,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:04:47,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:04:47,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:04:47,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:04:47,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:04:47,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:04:47,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:04:47,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:04:47,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:04:47,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:04:47,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:04:47,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:04:47,524 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:04:47,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:04:47,525 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 [2019-10-15 00:04:47,545 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:04:47,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:04:47,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:04:47,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:04:47,548 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:04:47,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:04:47,549 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:04:47,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:04:47,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:04:47,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:04:47,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:04:47,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:04:47,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:04:47,551 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:04:47,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:04:47,552 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:04:47,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:04:47,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:04:47,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:04:47,553 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:04:47,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:04:47,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:04:47,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:04:47,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:04:47,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:04:47,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:04:47,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:04:47,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:04:47,554 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 [2019-10-15 00:04:47,820 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:04:47,834 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:04:47,837 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:04:47,839 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:04:47,839 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:04:47,840 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label33.c [2019-10-15 00:04:47,902 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95acd5d8c/6ebeff8bb6b24432a9567a51a11996e7/FLAGb97895e3f [2019-10-15 00:04:48,691 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:04:48,692 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label33.c [2019-10-15 00:04:48,725 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95acd5d8c/6ebeff8bb6b24432a9567a51a11996e7/FLAGb97895e3f [2019-10-15 00:04:48,774 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95acd5d8c/6ebeff8bb6b24432a9567a51a11996e7 [2019-10-15 00:04:48,786 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:04:48,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:04:48,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:48,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:04:48,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:04:48,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:48" (1/1) ... [2019-10-15 00:04:48,801 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2e1afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:48, skipping insertion in model container [2019-10-15 00:04:48,802 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:48" (1/1) ... [2019-10-15 00:04:48,812 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:04:48,976 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:04:50,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:50,489 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:04:51,102 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:51,135 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:04:51,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:51 WrapperNode [2019-10-15 00:04:51,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:51,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:04:51,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:04:51,139 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:04:51,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:51" (1/1) ... [2019-10-15 00:04:51,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:51" (1/1) ... [2019-10-15 00:04:51,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:51" (1/1) ... [2019-10-15 00:04:51,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:51" (1/1) ... [2019-10-15 00:04:51,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:51" (1/1) ... [2019-10-15 00:04:51,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:51" (1/1) ... [2019-10-15 00:04:51,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:51" (1/1) ... [2019-10-15 00:04:51,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:04:51,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:04:51,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:04:51,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:04:51,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:51" (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 [2019-10-15 00:04:51,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:04:51,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:04:51,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:04:51,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:04:51,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:04:51,514 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 00:04:51,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:04:51,514 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:04:51,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:04:51,515 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:04:51,516 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 00:04:51,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:04:51,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:04:51,517 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:04:51,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:04:51,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:04:51,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:04:56,251 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:04:56,251 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:04:56,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:56 BoogieIcfgContainer [2019-10-15 00:04:56,257 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:04:56,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:04:56,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:04:56,262 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:04:56,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:04:48" (1/3) ... [2019-10-15 00:04:56,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e726448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:56, skipping insertion in model container [2019-10-15 00:04:56,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:51" (2/3) ... [2019-10-15 00:04:56,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e726448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:56, skipping insertion in model container [2019-10-15 00:04:56,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:56" (3/3) ... [2019-10-15 00:04:56,274 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label33.c [2019-10-15 00:04:56,287 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:04:56,300 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:04:56,312 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:04:56,350 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:04:56,350 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:04:56,350 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:04:56,350 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:04:56,350 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:04:56,351 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:04:56,351 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:04:56,351 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:04:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-15 00:04:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-15 00:04:56,399 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:56,400 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] [2019-10-15 00:04:56,402 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1837034062, now seen corresponding path program 1 times [2019-10-15 00:04:56,418 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:56,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451941211] [2019-10-15 00:04:56,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:56,419 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:56,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:56,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:56,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451941211] [2019-10-15 00:04:56,874 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:56,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:04:56,875 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994461849] [2019-10-15 00:04:56,880 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:04:56,882 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:56,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:04:56,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:04:56,900 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 4 states. [2019-10-15 00:05:05,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:05,754 INFO L93 Difference]: Finished difference Result 3230 states and 6251 transitions. [2019-10-15 00:05:05,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:05:05,758 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-10-15 00:05:05,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:05,798 INFO L225 Difference]: With dead ends: 3230 [2019-10-15 00:05:05,798 INFO L226 Difference]: Without dead ends: 2309 [2019-10-15 00:05:05,808 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:05,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2019-10-15 00:05:05,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2309. [2019-10-15 00:05:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2309 states. [2019-10-15 00:05:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 3821 transitions. [2019-10-15 00:05:05,977 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 3821 transitions. Word has length 55 [2019-10-15 00:05:05,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:05,978 INFO L462 AbstractCegarLoop]: Abstraction has 2309 states and 3821 transitions. [2019-10-15 00:05:05,978 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:05:05,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 3821 transitions. [2019-10-15 00:05:05,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-15 00:05:05,986 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:05,987 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:05:05,987 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:05,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1114761445, now seen corresponding path program 1 times [2019-10-15 00:05:05,988 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:05,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596801016] [2019-10-15 00:05:05,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:05,989 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:05,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:06,281 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596801016] [2019-10-15 00:05:06,282 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:06,282 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:05:06,282 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196938165] [2019-10-15 00:05:06,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:05:06,290 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:06,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:05:06,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:05:06,291 INFO L87 Difference]: Start difference. First operand 2309 states and 3821 transitions. Second operand 6 states. [2019-10-15 00:05:12,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:12,967 INFO L93 Difference]: Finished difference Result 7045 states and 11809 transitions. [2019-10-15 00:05:12,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:05:12,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 154 [2019-10-15 00:05:12,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:13,010 INFO L225 Difference]: With dead ends: 7045 [2019-10-15 00:05:13,011 INFO L226 Difference]: Without dead ends: 4742 [2019-10-15 00:05:13,018 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:05:13,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2019-10-15 00:05:13,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4697. [2019-10-15 00:05:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4697 states. [2019-10-15 00:05:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 7461 transitions. [2019-10-15 00:05:13,176 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 7461 transitions. Word has length 154 [2019-10-15 00:05:13,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:13,177 INFO L462 AbstractCegarLoop]: Abstraction has 4697 states and 7461 transitions. [2019-10-15 00:05:13,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:05:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 7461 transitions. [2019-10-15 00:05:13,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-10-15 00:05:13,186 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:13,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:05:13,187 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:13,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:13,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1950696993, now seen corresponding path program 1 times [2019-10-15 00:05:13,189 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:13,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123855203] [2019-10-15 00:05:13,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:13,190 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:13,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:13,427 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123855203] [2019-10-15 00:05:13,427 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:13,428 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:05:13,429 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719528474] [2019-10-15 00:05:13,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:05:13,434 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:13,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:05:13,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:13,436 INFO L87 Difference]: Start difference. First operand 4697 states and 7461 transitions. Second operand 4 states. [2019-10-15 00:05:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:21,253 INFO L93 Difference]: Finished difference Result 18736 states and 30951 transitions. [2019-10-15 00:05:21,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:05:21,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 204 [2019-10-15 00:05:21,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:21,323 INFO L225 Difference]: With dead ends: 18736 [2019-10-15 00:05:21,323 INFO L226 Difference]: Without dead ends: 14045 [2019-10-15 00:05:21,339 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 [2019-10-15 00:05:21,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14045 states. [2019-10-15 00:05:21,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14045 to 14045. [2019-10-15 00:05:21,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14045 states. [2019-10-15 00:05:21,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14045 states to 14045 states and 22285 transitions. [2019-10-15 00:05:21,770 INFO L78 Accepts]: Start accepts. Automaton has 14045 states and 22285 transitions. Word has length 204 [2019-10-15 00:05:21,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:21,772 INFO L462 AbstractCegarLoop]: Abstraction has 14045 states and 22285 transitions. [2019-10-15 00:05:21,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:05:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 14045 states and 22285 transitions. [2019-10-15 00:05:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-15 00:05:21,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:21,783 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, 2, 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] [2019-10-15 00:05:21,784 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:21,784 INFO L82 PathProgramCache]: Analyzing trace with hash -972211546, now seen corresponding path program 1 times [2019-10-15 00:05:21,785 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:21,785 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886557111] [2019-10-15 00:05:21,785 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:21,785 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:21,785 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:21,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:05:22,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886557111] [2019-10-15 00:05:22,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840348837] [2019-10-15 00:05:22,077 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 [2019-10-15 00:05:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:22,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:05:22,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:05:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-15 00:05:22,322 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:05:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:05:22,485 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:05:22,485 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2019-10-15 00:05:22,485 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167749755] [2019-10-15 00:05:22,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:22,486 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:22,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:22,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:05:22,487 INFO L87 Difference]: Start difference. First operand 14045 states and 22285 transitions. Second operand 5 states.