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/Problem03_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:59:00,325 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:59:00,327 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:59:00,339 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:59:00,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:59:00,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:59:00,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:59:00,344 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:59:00,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:59:00,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:59:00,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:59:00,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:59:00,350 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:59:00,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:59:00,351 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:59:00,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:59:00,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:59:00,354 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:59:00,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:59:00,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:59:00,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:59:00,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:59:00,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:59:00,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:59:00,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:59:00,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:59:00,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:59:00,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:59:00,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:59:00,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:59:00,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:59:00,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:59:00,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:59:00,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:59:00,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:59:00,371 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:59:00,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:59:00,372 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:59:00,372 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:59:00,373 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:59:00,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:59:00,374 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 [2019-10-14 23:59:00,390 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:59:00,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:59:00,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:59:00,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:59:00,394 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:59:00,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:59:00,394 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:59:00,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:59:00,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:59:00,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:59:00,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:59:00,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:59:00,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:59:00,396 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:59:00,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:59:00,397 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:59:00,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:59:00,398 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:59:00,398 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:59:00,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:59:00,398 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:59:00,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:59:00,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:59:00,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:59:00,399 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:59:00,399 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:59:00,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:59:00,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:59:00,400 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 [2019-10-14 23:59:00,708 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:59:00,725 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:59:00,729 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:59:00,730 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:59:00,731 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:59:00,732 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label54.c [2019-10-14 23:59:00,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b4c75bd1/4b02a15309b44464a832e531a5638538/FLAGc00890e74 [2019-10-14 23:59:01,481 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:59:01,481 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label54.c [2019-10-14 23:59:01,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b4c75bd1/4b02a15309b44464a832e531a5638538/FLAGc00890e74 [2019-10-14 23:59:01,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b4c75bd1/4b02a15309b44464a832e531a5638538 [2019-10-14 23:59:01,678 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:59:01,679 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:59:01,680 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:59:01,681 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:59:01,684 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:59:01,685 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:59:01" (1/1) ... [2019-10-14 23:59:01,688 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@641eaed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:01, skipping insertion in model container [2019-10-14 23:59:01,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:59:01" (1/1) ... [2019-10-14 23:59:01,697 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:59:01,776 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:59:02,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:59:02,629 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:59:03,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:59:03,055 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:59:03,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:03 WrapperNode [2019-10-14 23:59:03,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:59:03,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:59:03,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:59:03,058 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:59:03,074 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:03" (1/1) ... [2019-10-14 23:59:03,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:03" (1/1) ... [2019-10-14 23:59:03,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:03" (1/1) ... [2019-10-14 23:59:03,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:03" (1/1) ... [2019-10-14 23:59:03,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:03" (1/1) ... [2019-10-14 23:59:03,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:03" (1/1) ... [2019-10-14 23:59:03,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:03" (1/1) ... [2019-10-14 23:59:03,234 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:59:03,234 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:59:03,235 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:59:03,235 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:59:03,236 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:03" (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 [2019-10-14 23:59:03,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:59:03,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:59:03,293 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:59:03,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:59:03,294 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:59:03,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:59:03,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:59:03,294 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:59:03,295 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:59:03,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:59:03,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:59:05,349 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:59:05,350 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:59:05,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:59:05 BoogieIcfgContainer [2019-10-14 23:59:05,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:59:05,352 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:59:05,352 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:59:05,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:59:05,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:59:01" (1/3) ... [2019-10-14 23:59:05,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6912df9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:59:05, skipping insertion in model container [2019-10-14 23:59:05,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:59:03" (2/3) ... [2019-10-14 23:59:05,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6912df9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:59:05, skipping insertion in model container [2019-10-14 23:59:05,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:59:05" (3/3) ... [2019-10-14 23:59:05,365 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label54.c [2019-10-14 23:59:05,377 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:59:05,390 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:59:05,402 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:59:05,444 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:59:05,445 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:59:05,445 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:59:05,445 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:59:05,445 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:59:05,446 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:59:05,446 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:59:05,446 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:59:05,484 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 23:59:05,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-14 23:59:05,505 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:05,507 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:59:05,508 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:05,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:05,514 INFO L82 PathProgramCache]: Analyzing trace with hash -629671171, now seen corresponding path program 1 times [2019-10-14 23:59:05,522 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:05,522 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674708516] [2019-10-14 23:59:05,522 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:05,523 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:05,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:06,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674708516] [2019-10-14 23:59:06,264 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:59:06,264 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:59:06,264 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690867967] [2019-10-14 23:59:06,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:59:06,271 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:06,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:59:06,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:59:06,289 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-10-14 23:59:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:07,743 INFO L93 Difference]: Finished difference Result 845 states and 1488 transitions. [2019-10-14 23:59:07,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:59:07,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 172 [2019-10-14 23:59:07,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:07,778 INFO L225 Difference]: With dead ends: 845 [2019-10-14 23:59:07,778 INFO L226 Difference]: Without dead ends: 472 [2019-10-14 23:59:07,789 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:59:07,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2019-10-14 23:59:07,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 470. [2019-10-14 23:59:07,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2019-10-14 23:59:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 716 transitions. [2019-10-14 23:59:07,899 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 716 transitions. Word has length 172 [2019-10-14 23:59:07,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:07,901 INFO L462 AbstractCegarLoop]: Abstraction has 470 states and 716 transitions. [2019-10-14 23:59:07,901 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:59:07,901 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 716 transitions. [2019-10-14 23:59:07,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-14 23:59:07,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:07,908 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:59:07,908 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:07,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1631480425, now seen corresponding path program 1 times [2019-10-14 23:59:07,909 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:07,909 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863225291] [2019-10-14 23:59:07,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:07,910 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:07,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:08,286 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863225291] [2019-10-14 23:59:08,286 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:59:08,287 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:59:08,287 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361812342] [2019-10-14 23:59:08,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:59:08,290 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:59:08,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:59:08,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:59:08,291 INFO L87 Difference]: Start difference. First operand 470 states and 716 transitions. Second operand 3 states. [2019-10-14 23:59:09,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:59:09,485 INFO L93 Difference]: Finished difference Result 1358 states and 2098 transitions. [2019-10-14 23:59:09,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:59:09,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 184 [2019-10-14 23:59:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:59:09,493 INFO L225 Difference]: With dead ends: 1358 [2019-10-14 23:59:09,493 INFO L226 Difference]: Without dead ends: 894 [2019-10-14 23:59:09,495 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 [2019-10-14 23:59:09,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2019-10-14 23:59:09,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 888. [2019-10-14 23:59:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2019-10-14 23:59:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1298 transitions. [2019-10-14 23:59:09,535 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1298 transitions. Word has length 184 [2019-10-14 23:59:09,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:59:09,536 INFO L462 AbstractCegarLoop]: Abstraction has 888 states and 1298 transitions. [2019-10-14 23:59:09,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:59:09,536 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1298 transitions. [2019-10-14 23:59:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-14 23:59:09,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:59:09,542 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:59:09,542 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:59:09,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:59:09,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1113294976, now seen corresponding path program 1 times [2019-10-14 23:59:09,543 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:59:09,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350903141] [2019-10-14 23:59:09,544 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:09,544 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:59:09,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:59:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:09,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350903141] [2019-10-14 23:59:09,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703470805] [2019-10-14 23:59:09,707 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 [2019-10-14 23:59:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:59:09,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:59:10,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:59:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:10,170 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:59:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:59:10,309 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [59562938] [2019-10-14 23:59:10,333 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 195 [2019-10-14 23:59:10,411 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:59:10,411 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)