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/Problem10_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:02:20,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:02:20,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:02:20,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:02:20,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:02:20,522 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:02:20,523 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:02:20,525 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:02:20,527 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:02:20,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:02:20,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:02:20,529 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:02:20,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:02:20,531 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:02:20,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:02:20,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:02:20,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:02:20,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:02:20,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:02:20,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:02:20,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:02:20,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:02:20,541 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:02:20,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:02:20,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:02:20,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:02:20,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:02:20,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:02:20,554 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 00:02:20,568 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:02:20,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:02:20,569 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:02:20,569 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:02:20,570 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:02:20,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:02:20,570 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:02:20,570 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:02:20,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:02:20,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:02:20,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:02:20,571 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:02:20,571 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:02:20,572 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:02:20,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:02:20,572 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:02:20,572 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:02:20,572 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:02:20,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:02:20,573 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:02:20,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:02:20,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:20,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:02:20,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:02:20,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:02:20,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:02:20,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:02:20,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:02:20,575 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 00:02:20,908 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:02:20,924 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:02:20,928 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:02:20,930 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:02:20,930 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:02:20,931 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label57.c [2019-10-15 00:02:21,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3302819f/8b4979db37aa475a9f7129ee69b16b1c/FLAG3fadbfaea [2019-10-15 00:02:21,545 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:02:21,546 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label57.c [2019-10-15 00:02:21,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3302819f/8b4979db37aa475a9f7129ee69b16b1c/FLAG3fadbfaea [2019-10-15 00:02:21,815 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3302819f/8b4979db37aa475a9f7129ee69b16b1c [2019-10-15 00:02:21,827 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:02:21,828 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:02:21,833 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:21,833 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:02:21,837 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:02:21,838 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:21" (1/1) ... [2019-10-15 00:02:21,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@565e9bd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:21, skipping insertion in model container [2019-10-15 00:02:21,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:21" (1/1) ... [2019-10-15 00:02:21,853 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:02:21,917 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:02:22,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:22,513 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:02:22,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:22,666 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:02:22,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:22 WrapperNode [2019-10-15 00:02:22,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:22,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:02:22,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:02:22,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:02:22,686 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:22" (1/1) ... [2019-10-15 00:02:22,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:22" (1/1) ... [2019-10-15 00:02:22,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:22" (1/1) ... [2019-10-15 00:02:22,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:22" (1/1) ... [2019-10-15 00:02:22,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:22" (1/1) ... [2019-10-15 00:02:22,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:22" (1/1) ... [2019-10-15 00:02:22,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:22" (1/1) ... [2019-10-15 00:02:22,782 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:02:22,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:02:22,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:02:22,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:02:22,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:22" (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 00:02:22,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:02:22,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:02:22,872 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:02:22,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:02:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:02:22,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:02:22,874 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:02:22,874 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:02:22,875 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:02:22,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:02:22,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:02:24,214 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:02:24,215 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:02:24,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:24 BoogieIcfgContainer [2019-10-15 00:02:24,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:02:24,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:02:24,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:02:24,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:02:24,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:21" (1/3) ... [2019-10-15 00:02:24,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786af90a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:24, skipping insertion in model container [2019-10-15 00:02:24,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:22" (2/3) ... [2019-10-15 00:02:24,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@786af90a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:24, skipping insertion in model container [2019-10-15 00:02:24,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:24" (3/3) ... [2019-10-15 00:02:24,227 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label57.c [2019-10-15 00:02:24,238 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:02:24,250 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:02:24,261 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:02:24,300 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:02:24,300 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:02:24,300 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:02:24,300 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:02:24,300 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:02:24,301 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:02:24,301 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:02:24,301 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:02:24,327 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:02:24,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 00:02:24,333 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:24,334 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:24,335 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:24,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:24,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1937919393, now seen corresponding path program 1 times [2019-10-15 00:02:24,351 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:24,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643444418] [2019-10-15 00:02:24,351 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:24,352 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:24,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:24,552 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 00:02:24,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643444418] [2019-10-15 00:02:24,554 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:24,554 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:02:24,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773517405] [2019-10-15 00:02:24,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:02:24,561 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:24,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:02:24,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:24,579 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-15 00:02:25,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:25,642 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-15 00:02:25,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:25,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-10-15 00:02:25,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:25,667 INFO L225 Difference]: With dead ends: 571 [2019-10-15 00:02:25,668 INFO L226 Difference]: Without dead ends: 294 [2019-10-15 00:02:25,682 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 [2019-10-15 00:02:25,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-15 00:02:25,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-15 00:02:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:02:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-15 00:02:25,754 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 12 [2019-10-15 00:02:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:25,755 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-15 00:02:25,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:02:25,755 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-15 00:02:25,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-15 00:02:25,759 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:25,759 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:25,759 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:25,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1763471191, now seen corresponding path program 1 times [2019-10-15 00:02:25,760 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:25,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940860428] [2019-10-15 00:02:25,760 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:25,761 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:25,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:26,045 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940860428] [2019-10-15 00:02:26,045 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:26,045 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:26,045 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618414276] [2019-10-15 00:02:26,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:26,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:26,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:26,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:26,049 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 6 states. [2019-10-15 00:02:26,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:26,919 INFO L93 Difference]: Finished difference Result 741 states and 1136 transitions. [2019-10-15 00:02:26,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:26,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2019-10-15 00:02:26,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:26,923 INFO L225 Difference]: With dead ends: 741 [2019-10-15 00:02:26,924 INFO L226 Difference]: Without dead ends: 453 [2019-10-15 00:02:26,926 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 [2019-10-15 00:02:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-10-15 00:02:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-10-15 00:02:26,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-10-15 00:02:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 626 transitions. [2019-10-15 00:02:26,961 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 626 transitions. Word has length 85 [2019-10-15 00:02:26,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:26,962 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 626 transitions. [2019-10-15 00:02:26,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 626 transitions. [2019-10-15 00:02:26,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-15 00:02:26,966 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:26,966 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:26,966 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:26,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:26,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1349205117, now seen corresponding path program 1 times [2019-10-15 00:02:26,967 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:26,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60589495] [2019-10-15 00:02:26,967 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:26,968 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:26,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:27,076 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60589495] [2019-10-15 00:02:27,076 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:27,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:02:27,077 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381078319] [2019-10-15 00:02:27,077 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:02:27,077 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:27,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:02:27,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:27,078 INFO L87 Difference]: Start difference. First operand 445 states and 626 transitions. Second operand 3 states. [2019-10-15 00:02:27,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:27,713 INFO L93 Difference]: Finished difference Result 1319 states and 1891 transitions. [2019-10-15 00:02:27,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:27,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2019-10-15 00:02:27,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:27,720 INFO L225 Difference]: With dead ends: 1319 [2019-10-15 00:02:27,720 INFO L226 Difference]: Without dead ends: 880 [2019-10-15 00:02:27,722 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-10-15 00:02:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2019-10-15 00:02:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-10-15 00:02:27,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1152 transitions. [2019-10-15 00:02:27,796 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1152 transitions. Word has length 91 [2019-10-15 00:02:27,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:27,797 INFO L462 AbstractCegarLoop]: Abstraction has 880 states and 1152 transitions. [2019-10-15 00:02:27,797 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:02:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1152 transitions. [2019-10-15 00:02:27,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-15 00:02:27,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:27,802 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:27,802 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:27,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1323083418, now seen corresponding path program 1 times [2019-10-15 00:02:27,803 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:27,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518327132] [2019-10-15 00:02:27,803 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:27,804 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:27,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:28,004 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518327132] [2019-10-15 00:02:28,004 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:28,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:28,005 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539892836] [2019-10-15 00:02:28,007 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:28,007 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:28,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:28,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:28,008 INFO L87 Difference]: Start difference. First operand 880 states and 1152 transitions. Second operand 6 states. [2019-10-15 00:02:28,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:28,975 INFO L93 Difference]: Finished difference Result 2078 states and 2807 transitions. [2019-10-15 00:02:28,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:28,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2019-10-15 00:02:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:28,990 INFO L225 Difference]: With dead ends: 2078 [2019-10-15 00:02:28,990 INFO L226 Difference]: Without dead ends: 1204 [2019-10-15 00:02:28,992 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 00:02:28,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2019-10-15 00:02:29,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1192. [2019-10-15 00:02:29,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-15 00:02:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1575 transitions. [2019-10-15 00:02:29,048 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1575 transitions. Word has length 102 [2019-10-15 00:02:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:29,048 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1575 transitions. [2019-10-15 00:02:29,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1575 transitions. [2019-10-15 00:02:29,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-15 00:02:29,056 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:29,056 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:29,056 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:29,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:29,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1224939873, now seen corresponding path program 1 times [2019-10-15 00:02:29,057 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:29,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716261367] [2019-10-15 00:02:29,057 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:29,058 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:29,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:29,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716261367] [2019-10-15 00:02:29,320 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:29,321 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:29,321 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805140968] [2019-10-15 00:02:29,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:29,322 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:29,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:29,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:29,325 INFO L87 Difference]: Start difference. First operand 1192 states and 1575 transitions. Second operand 6 states. [2019-10-15 00:02:30,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:30,276 INFO L93 Difference]: Finished difference Result 2402 states and 3218 transitions. [2019-10-15 00:02:30,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:30,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 153 [2019-10-15 00:02:30,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:30,287 INFO L225 Difference]: With dead ends: 2402 [2019-10-15 00:02:30,287 INFO L226 Difference]: Without dead ends: 1216 [2019-10-15 00:02:30,291 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 [2019-10-15 00:02:30,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2019-10-15 00:02:30,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1061. [2019-10-15 00:02:30,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1061 states. [2019-10-15 00:02:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 1336 transitions. [2019-10-15 00:02:30,343 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 1336 transitions. Word has length 153 [2019-10-15 00:02:30,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:30,344 INFO L462 AbstractCegarLoop]: Abstraction has 1061 states and 1336 transitions. [2019-10-15 00:02:30,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:30,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 1336 transitions. [2019-10-15 00:02:30,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-15 00:02:30,352 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:30,352 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:30,352 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:30,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:30,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1765930408, now seen corresponding path program 1 times [2019-10-15 00:02:30,354 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:30,354 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403839117] [2019-10-15 00:02:30,354 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:30,354 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:30,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:30,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-15 00:02:30,530 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403839117] [2019-10-15 00:02:30,530 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:30,530 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:02:30,531 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128060609] [2019-10-15 00:02:30,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:02:30,532 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:30,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:02:30,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:30,532 INFO L87 Difference]: Start difference. First operand 1061 states and 1336 transitions. Second operand 3 states. [2019-10-15 00:02:31,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:31,266 INFO L93 Difference]: Finished difference Result 2990 states and 3832 transitions. [2019-10-15 00:02:31,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:31,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 189 [2019-10-15 00:02:31,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:31,278 INFO L225 Difference]: With dead ends: 2990 [2019-10-15 00:02:31,278 INFO L226 Difference]: Without dead ends: 1935 [2019-10-15 00:02:31,281 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:31,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1935 states. [2019-10-15 00:02:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1935 to 1790. [2019-10-15 00:02:31,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1790 states. [2019-10-15 00:02:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2201 transitions. [2019-10-15 00:02:31,337 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2201 transitions. Word has length 189 [2019-10-15 00:02:31,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:31,338 INFO L462 AbstractCegarLoop]: Abstraction has 1790 states and 2201 transitions. [2019-10-15 00:02:31,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:02:31,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2201 transitions. [2019-10-15 00:02:31,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-15 00:02:31,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:31,344 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:02:31,344 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:31,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1482117123, now seen corresponding path program 1 times [2019-10-15 00:02:31,345 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:31,345 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354495989] [2019-10-15 00:02:31,346 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:31,346 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:31,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-15 00:02:31,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354495989] [2019-10-15 00:02:31,642 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681258395] [2019-10-15 00:02:31,643 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 00:02:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:31,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:31,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:31,915 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:32,109 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [465983580] [2019-10-15 00:02:32,117 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 233 [2019-10-15 00:02:32,184 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:02:32,184 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:02:44,239 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.