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/Problem02_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:55:21,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:55:21,259 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:55:21,273 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:55:21,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:55:21,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:55:21,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:55:21,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:55:21,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:55:21,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:55:21,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:55:21,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:55:21,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:55:21,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:55:21,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:55:21,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:55:21,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:55:21,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:55:21,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:55:21,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:55:21,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:55:21,296 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:55:21,297 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:55:21,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:55:21,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:55:21,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:55:21,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:55:21,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:55:21,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:55:21,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:55:21,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:55:21,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:55:21,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:55:21,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:55:21,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:55:21,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:55:21,316 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 23:55:21,330 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:55:21,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:55:21,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:55:21,332 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:55:21,333 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:55:21,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:55:21,333 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:55:21,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:55:21,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:55:21,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:55:21,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:55:21,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:55:21,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:55:21,334 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:55:21,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:55:21,335 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:55:21,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:55:21,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:55:21,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:55:21,336 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:55:21,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:55:21,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:55:21,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:55:21,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:55:21,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:55:21,337 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:55:21,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:55:21,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:55:21,338 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 23:55:21,668 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:55:21,682 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:55:21,686 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:55:21,688 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:55:21,688 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:55:21,689 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label00.c [2019-10-14 23:55:21,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/064aa2025/eef0a6fc43bc4a8886bf018e57bf7bf8/FLAGeb89fe4be [2019-10-14 23:55:22,402 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:55:22,403 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label00.c [2019-10-14 23:55:22,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/064aa2025/eef0a6fc43bc4a8886bf018e57bf7bf8/FLAGeb89fe4be [2019-10-14 23:55:22,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/064aa2025/eef0a6fc43bc4a8886bf018e57bf7bf8 [2019-10-14 23:55:22,645 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:55:22,647 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:55:22,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:22,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:55:22,652 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:55:22,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:22" (1/1) ... [2019-10-14 23:55:22,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2730cc86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:22, skipping insertion in model container [2019-10-14 23:55:22,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:22" (1/1) ... [2019-10-14 23:55:22,663 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:55:22,717 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:55:23,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:23,373 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:55:23,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:23,520 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:55:23,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:23 WrapperNode [2019-10-14 23:55:23,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:23,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:55:23,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:55:23,522 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:55:23,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:23" (1/1) ... [2019-10-14 23:55:23,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:23" (1/1) ... [2019-10-14 23:55:23,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:23" (1/1) ... [2019-10-14 23:55:23,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:23" (1/1) ... [2019-10-14 23:55:23,633 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:23" (1/1) ... [2019-10-14 23:55:23,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:23" (1/1) ... [2019-10-14 23:55:23,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:23" (1/1) ... [2019-10-14 23:55:23,668 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:55:23,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:55:23,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:55:23,671 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:55:23,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:23" (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 23:55:23,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:55:23,774 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:55:23,774 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:55:23,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:55:23,775 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:55:23,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:55:23,775 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:55:23,776 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:55:23,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:55:23,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:55:23,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:55:25,047 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:55:25,050 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:55:25,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:25 BoogieIcfgContainer [2019-10-14 23:55:25,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:55:25,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:55:25,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:55:25,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:55:25,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:55:22" (1/3) ... [2019-10-14 23:55:25,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287b617c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:25, skipping insertion in model container [2019-10-14 23:55:25,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:23" (2/3) ... [2019-10-14 23:55:25,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287b617c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:25, skipping insertion in model container [2019-10-14 23:55:25,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:25" (3/3) ... [2019-10-14 23:55:25,076 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label00.c [2019-10-14 23:55:25,089 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:55:25,100 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:55:25,115 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:55:25,145 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:55:25,145 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:55:25,145 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:55:25,145 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:55:25,145 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:55:25,145 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:55:25,146 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:55:25,146 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:55:25,181 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:55:25,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 23:55:25,201 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:25,202 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] [2019-10-14 23:55:25,204 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:25,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:25,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1022555377, now seen corresponding path program 1 times [2019-10-14 23:55:25,221 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:25,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742920873] [2019-10-14 23:55:25,222 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:25,222 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:25,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:25,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:25,739 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 23:55:25,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742920873] [2019-10-14 23:55:25,741 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:25,741 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:55:25,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135020308] [2019-10-14 23:55:25,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:25,751 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:25,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:25,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:25,770 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:55:26,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:26,716 INFO L93 Difference]: Finished difference Result 615 states and 1053 transitions. [2019-10-14 23:55:26,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:26,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-14 23:55:26,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:26,747 INFO L225 Difference]: With dead ends: 615 [2019-10-14 23:55:26,747 INFO L226 Difference]: Without dead ends: 317 [2019-10-14 23:55:26,759 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 23:55:26,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2019-10-14 23:55:26,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2019-10-14 23:55:26,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-10-14 23:55:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 478 transitions. [2019-10-14 23:55:26,835 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 478 transitions. Word has length 121 [2019-10-14 23:55:26,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:26,836 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 478 transitions. [2019-10-14 23:55:26,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:26,837 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 478 transitions. [2019-10-14 23:55:26,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 23:55:26,842 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:26,842 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:26,842 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:26,843 INFO L82 PathProgramCache]: Analyzing trace with hash 145020396, now seen corresponding path program 1 times [2019-10-14 23:55:26,843 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:26,843 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260214540] [2019-10-14 23:55:26,844 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:26,844 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:26,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:26,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260214540] [2019-10-14 23:55:26,995 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:26,995 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:55:26,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991862589] [2019-10-14 23:55:26,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:55:26,999 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:26,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:55:27,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:55:27,000 INFO L87 Difference]: Start difference. First operand 317 states and 478 transitions. Second operand 6 states. [2019-10-14 23:55:27,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:27,976 INFO L93 Difference]: Finished difference Result 962 states and 1500 transitions. [2019-10-14 23:55:27,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:55:27,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 136 [2019-10-14 23:55:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:27,985 INFO L225 Difference]: With dead ends: 962 [2019-10-14 23:55:27,986 INFO L226 Difference]: Without dead ends: 651 [2019-10-14 23:55:27,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:55:27,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2019-10-14 23:55:28,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 625. [2019-10-14 23:55:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-10-14 23:55:28,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 923 transitions. [2019-10-14 23:55:28,068 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 923 transitions. Word has length 136 [2019-10-14 23:55:28,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:28,069 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 923 transitions. [2019-10-14 23:55:28,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:55:28,069 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 923 transitions. [2019-10-14 23:55:28,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-14 23:55:28,074 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:28,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:55:28,074 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:28,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:28,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1177628319, now seen corresponding path program 1 times [2019-10-14 23:55:28,075 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:28,075 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557794348] [2019-10-14 23:55:28,076 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:28,076 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:28,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:28,350 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557794348] [2019-10-14 23:55:28,350 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:28,351 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:55:28,351 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136442913] [2019-10-14 23:55:28,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:55:28,352 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:28,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:55:28,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:28,353 INFO L87 Difference]: Start difference. First operand 625 states and 923 transitions. Second operand 5 states. [2019-10-14 23:55:29,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:29,120 INFO L93 Difference]: Finished difference Result 1330 states and 2013 transitions. [2019-10-14 23:55:29,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:55:29,122 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-10-14 23:55:29,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:29,126 INFO L225 Difference]: With dead ends: 1330 [2019-10-14 23:55:29,127 INFO L226 Difference]: Without dead ends: 625 [2019-10-14 23:55:29,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:29,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2019-10-14 23:55:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 625. [2019-10-14 23:55:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-10-14 23:55:29,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 907 transitions. [2019-10-14 23:55:29,164 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 907 transitions. Word has length 147 [2019-10-14 23:55:29,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:29,165 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 907 transitions. [2019-10-14 23:55:29,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:55:29,165 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 907 transitions. [2019-10-14 23:55:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-10-14 23:55:29,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:29,171 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:55:29,171 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:29,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:29,171 INFO L82 PathProgramCache]: Analyzing trace with hash -2040126092, now seen corresponding path program 1 times [2019-10-14 23:55:29,172 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:29,172 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207155590] [2019-10-14 23:55:29,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:29,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:29,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:55:29,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207155590] [2019-10-14 23:55:29,308 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813273069] [2019-10-14 23:55:29,308 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 23:55:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:29,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:55:29,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:55:29,618 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:29,619 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:55:29,790 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:29,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1502159592] [2019-10-14 23:55:29,801 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 188 [2019-10-14 23:55:29,858 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:55:29,858 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)