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/Problem18_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:09:58,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:09:58,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:09:58,532 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:09:58,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:09:58,534 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:09:58,536 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:09:58,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:09:58,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:09:58,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:09:58,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:09:58,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:09:58,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:09:58,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:09:58,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:09:58,561 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:09:58,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:09:58,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:09:58,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:09:58,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:09:58,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:09:58,577 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:09:58,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:09:58,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:09:58,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:09:58,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:09:58,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:09:58,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:09:58,595 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 00:09:58,627 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:09:58,627 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:09:58,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:09:58,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:09:58,629 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:09:58,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:09:58,629 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:09:58,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:09:58,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:09:58,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:09:58,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:09:58,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:09:58,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:09:58,630 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:09:58,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:09:58,631 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:09:58,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:09:58,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:09:58,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:09:58,632 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:09:58,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:09:58,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:58,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:09:58,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:09:58,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:09:58,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:09:58,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:09:58,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:09:58,633 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 00:09:58,896 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:09:58,908 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:09:58,912 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:09:58,913 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:09:58,914 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:09:58,914 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label22.c [2019-10-15 00:09:58,995 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ceca4c81/a033d6929f3c42e683f1a4e279ee8b62/FLAGaf1d90990 [2019-10-15 00:09:59,827 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:09:59,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label22.c [2019-10-15 00:09:59,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ceca4c81/a033d6929f3c42e683f1a4e279ee8b62/FLAGaf1d90990 [2019-10-15 00:09:59,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ceca4c81/a033d6929f3c42e683f1a4e279ee8b62 [2019-10-15 00:09:59,941 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:09:59,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:09:59,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:59,944 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:09:59,948 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:09:59,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:59" (1/1) ... [2019-10-15 00:09:59,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1aa87bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:59, skipping insertion in model container [2019-10-15 00:09:59,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:59" (1/1) ... [2019-10-15 00:09:59,962 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:10:00,078 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:10:01,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:01,513 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:10:02,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:02,049 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:10:02,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:02 WrapperNode [2019-10-15 00:10:02,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:02,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:10:02,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:10:02,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:10:02,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:02" (1/1) ... [2019-10-15 00:10:02,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:02" (1/1) ... [2019-10-15 00:10:02,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:02" (1/1) ... [2019-10-15 00:10:02,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:02" (1/1) ... [2019-10-15 00:10:02,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:02" (1/1) ... [2019-10-15 00:10:02,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:02" (1/1) ... [2019-10-15 00:10:02,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:02" (1/1) ... [2019-10-15 00:10:02,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:10:02,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:10:02,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:10:02,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:10:02,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:02" (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 00:10:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:10:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:10:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:10:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:10:02,378 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:10:02,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:10:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:10:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:10:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:10:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:10:02,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:10:02,380 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:10:02,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:10:02,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:10:02,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:10:06,042 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:10:06,043 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:10:06,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:06 BoogieIcfgContainer [2019-10-15 00:10:06,045 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:10:06,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:10:06,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:10:06,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:10:06,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:59" (1/3) ... [2019-10-15 00:10:06,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c76b8bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:06, skipping insertion in model container [2019-10-15 00:10:06,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:02" (2/3) ... [2019-10-15 00:10:06,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c76b8bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:06, skipping insertion in model container [2019-10-15 00:10:06,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:06" (3/3) ... [2019-10-15 00:10:06,066 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label22.c [2019-10-15 00:10:06,077 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:10:06,089 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:10:06,101 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:10:06,151 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:10:06,151 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:10:06,151 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:10:06,151 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:10:06,152 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:10:06,152 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:10:06,152 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:10:06,152 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:10:06,197 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:10:06,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-15 00:10:06,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:06,209 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] [2019-10-15 00:10:06,212 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:06,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:06,219 INFO L82 PathProgramCache]: Analyzing trace with hash -864903206, now seen corresponding path program 1 times [2019-10-15 00:10:06,227 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:06,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336538058] [2019-10-15 00:10:06,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:06,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:06,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:06,578 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 00:10:06,579 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336538058] [2019-10-15 00:10:06,580 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:06,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:10:06,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48723767] [2019-10-15 00:10:06,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:10:06,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:06,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:10:06,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:10:06,605 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-15 00:10:11,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:11,039 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-15 00:10:11,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:10:11,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2019-10-15 00:10:11,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:11,074 INFO L225 Difference]: With dead ends: 2248 [2019-10-15 00:10:11,075 INFO L226 Difference]: Without dead ends: 1412 [2019-10-15 00:10:11,086 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 00:10:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-15 00:10:11,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-15 00:10:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-15 00:10:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-10-15 00:10:11,234 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 47 [2019-10-15 00:10:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:11,235 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-10-15 00:10:11,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:10:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-10-15 00:10:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-15 00:10:11,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:11,241 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:11,242 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:11,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:11,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1267579837, now seen corresponding path program 1 times [2019-10-15 00:10:11,243 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:11,243 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947425123] [2019-10-15 00:10:11,243 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:11,243 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:11,243 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:11,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:11,391 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:11,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947425123] [2019-10-15 00:10:11,392 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:11,393 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:10:11,393 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117509577] [2019-10-15 00:10:11,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:11,395 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:11,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:10:11,396 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 5 states. [2019-10-15 00:10:17,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:17,110 INFO L93 Difference]: Finished difference Result 3572 states and 6416 transitions. [2019-10-15 00:10:17,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:17,111 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 118 [2019-10-15 00:10:17,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:17,127 INFO L225 Difference]: With dead ends: 3572 [2019-10-15 00:10:17,127 INFO L226 Difference]: Without dead ends: 2166 [2019-10-15 00:10:17,140 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:10:17,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2019-10-15 00:10:17,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2146. [2019-10-15 00:10:17,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2146 states. [2019-10-15 00:10:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3628 transitions. [2019-10-15 00:10:17,217 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3628 transitions. Word has length 118 [2019-10-15 00:10:17,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:17,220 INFO L462 AbstractCegarLoop]: Abstraction has 2146 states and 3628 transitions. [2019-10-15 00:10:17,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:17,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3628 transitions. [2019-10-15 00:10:17,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 00:10:17,230 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:17,232 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:17,232 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:17,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:17,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1213598126, now seen corresponding path program 1 times [2019-10-15 00:10:17,234 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:17,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268031704] [2019-10-15 00:10:17,234 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:17,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:17,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:17,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:17,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268031704] [2019-10-15 00:10:17,499 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:17,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:17,500 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072700728] [2019-10-15 00:10:17,502 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:17,503 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:17,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:17,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:17,508 INFO L87 Difference]: Start difference. First operand 2146 states and 3628 transitions. Second operand 6 states. [2019-10-15 00:10:22,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:22,671 INFO L93 Difference]: Finished difference Result 5051 states and 8506 transitions. [2019-10-15 00:10:22,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:22,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-15 00:10:22,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:22,696 INFO L225 Difference]: With dead ends: 5051 [2019-10-15 00:10:22,696 INFO L226 Difference]: Without dead ends: 2911 [2019-10-15 00:10:22,704 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 00:10:22,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-10-15 00:10:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2887. [2019-10-15 00:10:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2019-10-15 00:10:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4487 transitions. [2019-10-15 00:10:22,805 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4487 transitions. Word has length 141 [2019-10-15 00:10:22,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:22,806 INFO L462 AbstractCegarLoop]: Abstraction has 2887 states and 4487 transitions. [2019-10-15 00:10:22,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:22,806 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4487 transitions. [2019-10-15 00:10:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-15 00:10:22,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:22,812 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:22,812 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:22,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:22,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1078405386, now seen corresponding path program 1 times [2019-10-15 00:10:22,813 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:22,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207042839] [2019-10-15 00:10:22,813 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:22,813 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:22,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:22,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207042839] [2019-10-15 00:10:22,992 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:22,992 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:22,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999093962] [2019-10-15 00:10:22,994 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:22,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:22,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:22,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:22,995 INFO L87 Difference]: Start difference. First operand 2887 states and 4487 transitions. Second operand 6 states. [2019-10-15 00:10:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:27,680 INFO L93 Difference]: Finished difference Result 6543 states and 10148 transitions. [2019-10-15 00:10:27,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:27,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-10-15 00:10:27,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:27,699 INFO L225 Difference]: With dead ends: 6543 [2019-10-15 00:10:27,699 INFO L226 Difference]: Without dead ends: 3662 [2019-10-15 00:10:27,706 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 00:10:27,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2019-10-15 00:10:27,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3642. [2019-10-15 00:10:27,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3642 states. [2019-10-15 00:10:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 5124 transitions. [2019-10-15 00:10:27,794 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 5124 transitions. Word has length 145 [2019-10-15 00:10:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:27,795 INFO L462 AbstractCegarLoop]: Abstraction has 3642 states and 5124 transitions. [2019-10-15 00:10:27,795 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 5124 transitions. [2019-10-15 00:10:27,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-15 00:10:27,799 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:27,799 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:10:27,799 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:27,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:27,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1863725289, now seen corresponding path program 1 times [2019-10-15 00:10:27,800 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:27,800 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029198273] [2019-10-15 00:10:27,800 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:27,801 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:27,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:28,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029198273] [2019-10-15 00:10:28,015 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:28,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:28,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049647159] [2019-10-15 00:10:28,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:28,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:28,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:28,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:28,017 INFO L87 Difference]: Start difference. First operand 3642 states and 5124 transitions. Second operand 6 states. [2019-10-15 00:10:33,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:33,207 INFO L93 Difference]: Finished difference Result 10404 states and 14982 transitions. [2019-10-15 00:10:33,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:33,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2019-10-15 00:10:33,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:33,241 INFO L225 Difference]: With dead ends: 10404 [2019-10-15 00:10:33,241 INFO L226 Difference]: Without dead ends: 6768 [2019-10-15 00:10:33,250 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 00:10:33,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2019-10-15 00:10:33,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6670. [2019-10-15 00:10:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2019-10-15 00:10:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 9031 transitions. [2019-10-15 00:10:33,410 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 9031 transitions. Word has length 176 [2019-10-15 00:10:33,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:33,411 INFO L462 AbstractCegarLoop]: Abstraction has 6670 states and 9031 transitions. [2019-10-15 00:10:33,411 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:33,411 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 9031 transitions. [2019-10-15 00:10:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-15 00:10:33,416 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:33,416 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, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:10:33,416 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:33,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:33,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1485271607, now seen corresponding path program 1 times [2019-10-15 00:10:33,417 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:33,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557024088] [2019-10-15 00:10:33,417 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:33,418 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:33,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:33,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:33,597 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 80 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:33,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557024088] [2019-10-15 00:10:33,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459417776] [2019-10-15 00:10:33,598 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 00:10:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:33,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:10:33,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-15 00:10:33,930 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 80 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:34,106 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:10:34,106 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-15 00:10:34,106 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431762730] [2019-10-15 00:10:34,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:34,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:34,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:34,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:34,114 INFO L87 Difference]: Start difference. First operand 6670 states and 9031 transitions. Second operand 5 states.