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/Problem15_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:07:46,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:07:46,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:07:46,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:07:46,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:07:46,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:07:46,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:07:46,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:07:46,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:07:46,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:07:46,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:07:46,278 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:07:46,278 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:07:46,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:07:46,283 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:07:46,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:07:46,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:07:46,286 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:07:46,288 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:07:46,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:07:46,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:07:46,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:07:46,303 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:07:46,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:07:46,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:07:46,311 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:07:46,312 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:07:46,313 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:07:46,314 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:07:46,316 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:07:46,316 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:07:46,317 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:07:46,317 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:07:46,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:07:46,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:07:46,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:07:46,320 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 00:07:46,334 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:07:46,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:07:46,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:07:46,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:07:46,336 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:07:46,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:07:46,337 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:07:46,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:07:46,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:07:46,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:07:46,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:07:46,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:07:46,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:07:46,338 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:07:46,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:07:46,338 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:07:46,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:07:46,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:07:46,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:07:46,339 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:07:46,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:07:46,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:07:46,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:07:46,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:07:46,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:07:46,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:07:46,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:07:46,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:07:46,341 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 00:07:46,645 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:07:46,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:07:46,672 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:07:46,674 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:07:46,674 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:07:46,675 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label54.c [2019-10-15 00:07:46,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d00de4600/027d82103a24416a8e66cc2150a3362e/FLAGe63f9f025 [2019-10-15 00:07:47,511 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:07:47,512 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label54.c [2019-10-15 00:07:47,532 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d00de4600/027d82103a24416a8e66cc2150a3362e/FLAGe63f9f025 [2019-10-15 00:07:47,649 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d00de4600/027d82103a24416a8e66cc2150a3362e [2019-10-15 00:07:47,660 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:07:47,662 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:07:47,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:47,664 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:07:47,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:07:47,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:47" (1/1) ... [2019-10-15 00:07:47,670 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbd8e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:47, skipping insertion in model container [2019-10-15 00:07:47,670 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:07:47" (1/1) ... [2019-10-15 00:07:47,678 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:07:47,771 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:07:48,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:48,769 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:07:49,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:07:49,131 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:07:49,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:49 WrapperNode [2019-10-15 00:07:49,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:07:49,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:07:49,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:07:49,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:07:49,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:49" (1/1) ... [2019-10-15 00:07:49,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:49" (1/1) ... [2019-10-15 00:07:49,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:49" (1/1) ... [2019-10-15 00:07:49,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:49" (1/1) ... [2019-10-15 00:07:49,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:49" (1/1) ... [2019-10-15 00:07:49,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:49" (1/1) ... [2019-10-15 00:07:49,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:49" (1/1) ... [2019-10-15 00:07:49,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:07:49,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:07:49,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:07:49,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:07:49,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:49" (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 00:07:49,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:07:49,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:07:49,402 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:07:49,403 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:07:49,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:07:49,404 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:07:49,404 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:07:49,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:07:49,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:07:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:07:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:07:49,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:07:49,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:07:53,484 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:07:53,484 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:07:53,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:53 BoogieIcfgContainer [2019-10-15 00:07:53,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:07:53,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:07:53,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:07:53,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:07:53,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:07:47" (1/3) ... [2019-10-15 00:07:53,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a106e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:53, skipping insertion in model container [2019-10-15 00:07:53,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:07:49" (2/3) ... [2019-10-15 00:07:53,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37a106e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:07:53, skipping insertion in model container [2019-10-15 00:07:53,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:07:53" (3/3) ... [2019-10-15 00:07:53,495 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label54.c [2019-10-15 00:07:53,509 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:07:53,521 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:07:53,535 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:07:53,587 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:07:53,587 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:07:53,587 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:07:53,587 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:07:53,587 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:07:53,588 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:07:53,588 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:07:53,588 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:07:53,630 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-15 00:07:53,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-15 00:07:53,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:53,643 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] [2019-10-15 00:07:53,646 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:53,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:53,652 INFO L82 PathProgramCache]: Analyzing trace with hash 54256576, now seen corresponding path program 1 times [2019-10-15 00:07:53,665 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:53,666 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762707901] [2019-10-15 00:07:53,666 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:53,667 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:53,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:54,030 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 00:07:54,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762707901] [2019-10-15 00:07:54,031 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:54,032 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:07:54,032 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644878345] [2019-10-15 00:07:54,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:07:54,039 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:54,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:07:54,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:07:54,057 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 3 states. [2019-10-15 00:07:57,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:07:57,137 INFO L93 Difference]: Finished difference Result 1189 states and 2144 transitions. [2019-10-15 00:07:57,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:07:57,139 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2019-10-15 00:07:57,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:07:57,163 INFO L225 Difference]: With dead ends: 1189 [2019-10-15 00:07:57,164 INFO L226 Difference]: Without dead ends: 690 [2019-10-15 00:07:57,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 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 00:07:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2019-10-15 00:07:57,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 690. [2019-10-15 00:07:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2019-10-15 00:07:57,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1151 transitions. [2019-10-15 00:07:57,294 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1151 transitions. Word has length 46 [2019-10-15 00:07:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:07:57,295 INFO L462 AbstractCegarLoop]: Abstraction has 690 states and 1151 transitions. [2019-10-15 00:07:57,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:07:57,295 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1151 transitions. [2019-10-15 00:07:57,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-15 00:07:57,308 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:07:57,309 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:07:57,309 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:07:57,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:57,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1294252235, now seen corresponding path program 1 times [2019-10-15 00:07:57,310 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:07:57,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740245532] [2019-10-15 00:07:57,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:57,311 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:07:57,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:07:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:07:57,554 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:07:57,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740245532] [2019-10-15 00:07:57,554 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:07:57,555 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:07:57,555 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560517426] [2019-10-15 00:07:57,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:07:57,557 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:57,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:07:57,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:07:57,558 INFO L87 Difference]: Start difference. First operand 690 states and 1151 transitions. Second operand 5 states. [2019-10-15 00:08:04,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:04,961 INFO L93 Difference]: Finished difference Result 3246 states and 5572 transitions. [2019-10-15 00:08:04,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 00:08:04,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 126 [2019-10-15 00:08:04,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:04,992 INFO L225 Difference]: With dead ends: 3246 [2019-10-15 00:08:04,993 INFO L226 Difference]: Without dead ends: 2562 [2019-10-15 00:08:04,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:08:05,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2019-10-15 00:08:05,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 2562. [2019-10-15 00:08:05,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2562 states. [2019-10-15 00:08:05,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2562 states to 2562 states and 3980 transitions. [2019-10-15 00:08:05,157 INFO L78 Accepts]: Start accepts. Automaton has 2562 states and 3980 transitions. Word has length 126 [2019-10-15 00:08:05,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:05,161 INFO L462 AbstractCegarLoop]: Abstraction has 2562 states and 3980 transitions. [2019-10-15 00:08:05,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:08:05,161 INFO L276 IsEmpty]: Start isEmpty. Operand 2562 states and 3980 transitions. [2019-10-15 00:08:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-15 00:08:05,178 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:05,178 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:08:05,179 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1175711612, now seen corresponding path program 1 times [2019-10-15 00:08:05,181 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:05,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274360287] [2019-10-15 00:08:05,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:05,183 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:05,184 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:05,641 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274360287] [2019-10-15 00:08:05,641 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:05,642 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:05,642 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694971543] [2019-10-15 00:08:05,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:05,646 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:05,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:05,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:05,652 INFO L87 Difference]: Start difference. First operand 2562 states and 3980 transitions. Second operand 6 states. [2019-10-15 00:08:10,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:10,099 INFO L93 Difference]: Finished difference Result 5805 states and 9226 transitions. [2019-10-15 00:08:10,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:08:10,101 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2019-10-15 00:08:10,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:10,133 INFO L225 Difference]: With dead ends: 5805 [2019-10-15 00:08:10,142 INFO L226 Difference]: Without dead ends: 3249 [2019-10-15 00:08:10,154 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:08:10,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3249 states. [2019-10-15 00:08:10,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3249 to 2620. [2019-10-15 00:08:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2620 states. [2019-10-15 00:08:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2620 states to 2620 states and 3834 transitions. [2019-10-15 00:08:10,287 INFO L78 Accepts]: Start accepts. Automaton has 2620 states and 3834 transitions. Word has length 145 [2019-10-15 00:08:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:10,288 INFO L462 AbstractCegarLoop]: Abstraction has 2620 states and 3834 transitions. [2019-10-15 00:08:10,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2620 states and 3834 transitions. [2019-10-15 00:08:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-15 00:08:10,295 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:10,296 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, 2, 2, 2, 2, 2, 2, 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 00:08:10,296 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:10,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1689745416, now seen corresponding path program 1 times [2019-10-15 00:08:10,297 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:10,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937493194] [2019-10-15 00:08:10,298 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:10,298 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:10,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:10,520 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:10,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937493194] [2019-10-15 00:08:10,521 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846410986] [2019-10-15 00:08:10,522 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 00:08:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:10,632 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:08:10,643 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:10,802 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:10,986 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [113610] [2019-10-15 00:08:10,994 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 215 [2019-10-15 00:08:11,066 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:08:11,067 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:08:14,466 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:08:14,469 INFO L272 AbstractInterpreter]: Visited 102 different actions 102 times. Never merged. Never widened. Performed 243 root evaluator evaluations with a maximum evaluation depth of 13. Performed 243 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:08:14,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:14,474 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:08:16,489 INFO L227 lantSequenceWeakener]: Weakened 193 states. On average, predicates are now at 78.08% of their original sizes. [2019-10-15 00:08:16,490 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:08:16,583 INFO L553 sIntCurrentIteration]: We unified 213 AI predicates to 213 [2019-10-15 00:08:16,583 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:08:16,584 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:08:16,584 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 5, 5] total 20 [2019-10-15 00:08:16,585 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105207097] [2019-10-15 00:08:16,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 00:08:16,588 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:16,588 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:08:16,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 00:08:16,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:08:16,589 INFO L87 Difference]: Start difference. First operand 2620 states and 3834 transitions. Second operand 11 states.