java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:06:28,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:06:28,179 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:06:28,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:06:28,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:06:28,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:06:28,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:06:28,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:06:28,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:06:28,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:06:28,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:06:28,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:06:28,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:06:28,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:06:28,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:06:28,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:06:28,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:06:28,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:06:28,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:06:28,237 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:06:28,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:06:28,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:06:28,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:06:28,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:06:28,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:06:28,260 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:06:28,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:06:28,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:06:28,265 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 00:06:28,284 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:06:28,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:06:28,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:06:28,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:06:28,286 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:06:28,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:06:28,287 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:06:28,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:06:28,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:06:28,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:06:28,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:06:28,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:06:28,289 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:06:28,289 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:06:28,290 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:06:28,290 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:06:28,290 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:06:28,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:06:28,290 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:06:28,291 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:06:28,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:06:28,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:06:28,291 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:06:28,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:06:28,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:06:28,292 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:06:28,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:06:28,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:06:28,293 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 00:06:28,571 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:06:28,584 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:06:28,588 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:06:28,589 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:06:28,589 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:06:28,590 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45.c [2019-10-15 00:06:28,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7984750ca/3852beabbf0643fcb4c7d5455b7ba10a/FLAG5cc6e3262 [2019-10-15 00:06:29,219 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:06:29,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label45.c [2019-10-15 00:06:29,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7984750ca/3852beabbf0643fcb4c7d5455b7ba10a/FLAG5cc6e3262 [2019-10-15 00:06:29,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7984750ca/3852beabbf0643fcb4c7d5455b7ba10a [2019-10-15 00:06:29,525 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:06:29,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:06:29,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:29,529 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:06:29,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:06:29,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:29" (1/1) ... [2019-10-15 00:06:29,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac730e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:29, skipping insertion in model container [2019-10-15 00:06:29,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:29" (1/1) ... [2019-10-15 00:06:29,543 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:06:29,591 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:06:30,142 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:30,148 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:06:30,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:30,345 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:06:30,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:30 WrapperNode [2019-10-15 00:06:30,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:30,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:06:30,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:06:30,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:06:30,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:30" (1/1) ... [2019-10-15 00:06:30,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:30" (1/1) ... [2019-10-15 00:06:30,419 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:30" (1/1) ... [2019-10-15 00:06:30,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:30" (1/1) ... [2019-10-15 00:06:30,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:30" (1/1) ... [2019-10-15 00:06:30,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:30" (1/1) ... [2019-10-15 00:06:30,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:30" (1/1) ... [2019-10-15 00:06:30,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:06:30,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:06:30,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:06:30,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:06:30,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:30" (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 00:06:30,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:06:30,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:06:30,654 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:06:30,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:06:30,654 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:06:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:06:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:06:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:06:30,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:06:30,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:06:30,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:06:32,224 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:06:32,224 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:06:32,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:32 BoogieIcfgContainer [2019-10-15 00:06:32,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:06:32,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:06:32,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:06:32,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:06:32,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:06:29" (1/3) ... [2019-10-15 00:06:32,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e48137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:32, skipping insertion in model container [2019-10-15 00:06:32,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:30" (2/3) ... [2019-10-15 00:06:32,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e48137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:32, skipping insertion in model container [2019-10-15 00:06:32,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:32" (3/3) ... [2019-10-15 00:06:32,235 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label45.c [2019-10-15 00:06:32,245 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:06:32,253 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:06:32,265 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:06:32,293 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:06:32,293 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:06:32,293 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:06:32,294 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:06:32,294 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:06:32,295 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:06:32,296 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:06:32,296 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:06:32,323 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:06:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 00:06:32,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:32,332 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] [2019-10-15 00:06:32,334 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:32,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1020079963, now seen corresponding path program 1 times [2019-10-15 00:06:32,348 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:32,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948058733] [2019-10-15 00:06:32,348 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:32,349 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:32,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:32,649 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 00:06:32,651 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948058733] [2019-10-15 00:06:32,652 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:32,652 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:06:32,653 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617035047] [2019-10-15 00:06:32,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:06:32,661 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:32,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:06:32,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:32,684 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-15 00:06:34,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:34,595 INFO L93 Difference]: Finished difference Result 890 states and 1606 transitions. [2019-10-15 00:06:34,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:06:34,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2019-10-15 00:06:34,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:34,619 INFO L225 Difference]: With dead ends: 890 [2019-10-15 00:06:34,620 INFO L226 Difference]: Without dead ends: 554 [2019-10-15 00:06:34,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:34,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-15 00:06:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 372. [2019-10-15 00:06:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-15 00:06:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 524 transitions. [2019-10-15 00:06:34,716 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 524 transitions. Word has length 42 [2019-10-15 00:06:34,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:34,717 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 524 transitions. [2019-10-15 00:06:34,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:06:34,718 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 524 transitions. [2019-10-15 00:06:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-15 00:06:34,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:34,725 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:06:34,725 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:34,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2050989129, now seen corresponding path program 1 times [2019-10-15 00:06:34,726 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:34,726 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336852422] [2019-10-15 00:06:34,726 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:34,727 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:34,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:34,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336852422] [2019-10-15 00:06:34,973 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:34,973 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:06:34,974 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432535035] [2019-10-15 00:06:34,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:06:34,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:34,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:06:34,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:34,986 INFO L87 Difference]: Start difference. First operand 372 states and 524 transitions. Second operand 4 states. [2019-10-15 00:06:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:36,570 INFO L93 Difference]: Finished difference Result 1466 states and 2091 transitions. [2019-10-15 00:06:36,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:06:36,570 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2019-10-15 00:06:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:36,576 INFO L225 Difference]: With dead ends: 1466 [2019-10-15 00:06:36,577 INFO L226 Difference]: Without dead ends: 736 [2019-10-15 00:06:36,579 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:36,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2019-10-15 00:06:36,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 554. [2019-10-15 00:06:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-15 00:06:36,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 809 transitions. [2019-10-15 00:06:36,613 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 809 transitions. Word has length 125 [2019-10-15 00:06:36,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:36,614 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 809 transitions. [2019-10-15 00:06:36,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:06:36,614 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 809 transitions. [2019-10-15 00:06:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 00:06:36,617 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:36,618 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:06:36,618 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:36,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:36,619 INFO L82 PathProgramCache]: Analyzing trace with hash 488627185, now seen corresponding path program 1 times [2019-10-15 00:06:36,619 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:36,619 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75956037] [2019-10-15 00:06:36,619 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:36,620 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:36,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:36,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75956037] [2019-10-15 00:06:36,726 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:36,727 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:06:36,727 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823058859] [2019-10-15 00:06:36,727 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:06:36,728 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:36,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:06:36,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:36,729 INFO L87 Difference]: Start difference. First operand 554 states and 809 transitions. Second operand 4 states. [2019-10-15 00:06:38,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:38,113 INFO L93 Difference]: Finished difference Result 2194 states and 3264 transitions. [2019-10-15 00:06:38,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:06:38,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-10-15 00:06:38,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:38,124 INFO L225 Difference]: With dead ends: 2194 [2019-10-15 00:06:38,125 INFO L226 Difference]: Without dead ends: 1646 [2019-10-15 00:06:38,127 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:38,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-10-15 00:06:38,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2019-10-15 00:06:38,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-10-15 00:06:38,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2286 transitions. [2019-10-15 00:06:38,193 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2286 transitions. Word has length 137 [2019-10-15 00:06:38,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:38,194 INFO L462 AbstractCegarLoop]: Abstraction has 1646 states and 2286 transitions. [2019-10-15 00:06:38,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:06:38,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2286 transitions. [2019-10-15 00:06:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-10-15 00:06:38,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:38,204 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:06:38,205 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:38,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1957605909, now seen corresponding path program 1 times [2019-10-15 00:06:38,206 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:38,206 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670971454] [2019-10-15 00:06:38,206 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:38,207 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:38,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:38,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670971454] [2019-10-15 00:06:38,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943403171] [2019-10-15 00:06:38,543 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 00:06:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:38,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:06:38,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:06:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:38,851 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:06:39,082 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:39,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [189183680] [2019-10-15 00:06:39,105 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 257 [2019-10-15 00:06:39,178 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:06:39,178 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:06:49,507 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:06:49,509 INFO L272 AbstractInterpreter]: Visited 124 different actions 124 times. Never merged. Never widened. Performed 287 root evaluator evaluations with a maximum evaluation depth of 13. Performed 287 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:06:49,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:49,516 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:06:58,849 INFO L227 lantSequenceWeakener]: Weakened 237 states. On average, predicates are now at 77.85% of their original sizes. [2019-10-15 00:06:58,849 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:06:58,943 INFO L553 sIntCurrentIteration]: We unified 255 AI predicates to 255 [2019-10-15 00:06:58,943 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:06:58,944 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:06:58,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 5, 5] total 20 [2019-10-15 00:06:58,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233534349] [2019-10-15 00:06:58,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 00:06:58,948 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:58,949 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:06:58,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 00:06:58,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:06:58,949 INFO L87 Difference]: Start difference. First operand 1646 states and 2286 transitions. Second operand 11 states.