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/Problem01_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:55:09,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:55:09,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:55:09,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:55:09,274 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:55:09,275 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:55:09,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:55:09,278 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:55:09,280 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:55:09,281 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:55:09,282 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:55:09,283 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:55:09,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:55:09,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:55:09,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:55:09,286 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:55:09,287 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:55:09,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:55:09,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:55:09,291 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:55:09,293 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:55:09,294 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:55:09,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:55:09,296 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:55:09,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:55:09,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:55:09,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:55:09,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:55:09,309 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:55:09,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:55:09,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:55:09,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:55:09,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:55:09,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:55:09,313 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:55:09,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:55:09,315 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 23:55:09,336 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:55:09,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:55:09,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:55:09,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:55:09,338 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:55:09,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:55:09,338 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:55:09,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:55:09,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:55:09,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:55:09,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:55:09,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:55:09,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:55:09,340 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:55:09,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:55:09,340 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:55:09,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:55:09,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:55:09,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:55:09,342 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:55:09,342 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:55:09,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:55:09,343 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:55:09,343 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:55:09,343 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:55:09,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:55:09,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:55:09,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:55:09,344 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 23:55:09,650 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:55:09,668 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:55:09,672 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:55:09,673 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:55:09,674 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:55:09,674 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2019-10-14 23:55:09,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e4c77f4/bf534f1e3f124f53a7f506621d4f088d/FLAGe56315b5b [2019-10-14 23:55:10,332 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:55:10,333 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label56.c [2019-10-14 23:55:10,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e4c77f4/bf534f1e3f124f53a7f506621d4f088d/FLAGe56315b5b [2019-10-14 23:55:10,634 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70e4c77f4/bf534f1e3f124f53a7f506621d4f088d [2019-10-14 23:55:10,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:55:10,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:55:10,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:10,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:55:10,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:55:10,653 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:10" (1/1) ... [2019-10-14 23:55:10,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145ffc26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:10, skipping insertion in model container [2019-10-14 23:55:10,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:10" (1/1) ... [2019-10-14 23:55:10,665 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:55:10,725 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:55:11,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:11,245 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:55:11,373 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:11,393 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:55:11,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:11 WrapperNode [2019-10-14 23:55:11,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:11,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:55:11,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:55:11,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:55:11,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:11" (1/1) ... [2019-10-14 23:55:11,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:11" (1/1) ... [2019-10-14 23:55:11,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:11" (1/1) ... [2019-10-14 23:55:11,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:11" (1/1) ... [2019-10-14 23:55:11,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:11" (1/1) ... [2019-10-14 23:55:11,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:11" (1/1) ... [2019-10-14 23:55:11,521 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:11" (1/1) ... [2019-10-14 23:55:11,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:55:11,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:55:11,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:55:11,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:55:11,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:11" (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 23:55:11,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:55:11,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:55:11,588 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:55:11,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:55:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:55:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:55:11,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:55:11,589 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:55:11,589 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:55:11,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:55:11,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:55:12,715 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:55:12,716 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:55:12,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:12 BoogieIcfgContainer [2019-10-14 23:55:12,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:55:12,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:55:12,719 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:55:12,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:55:12,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:55:10" (1/3) ... [2019-10-14 23:55:12,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bee86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:12, skipping insertion in model container [2019-10-14 23:55:12,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:11" (2/3) ... [2019-10-14 23:55:12,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bee86f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:12, skipping insertion in model container [2019-10-14 23:55:12,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:12" (3/3) ... [2019-10-14 23:55:12,726 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label56.c [2019-10-14 23:55:12,738 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:55:12,748 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:55:12,761 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:55:12,793 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:55:12,793 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:55:12,794 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:55:12,794 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:55:12,794 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:55:12,794 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:55:12,794 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:55:12,795 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:55:12,818 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:55:12,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-14 23:55:12,828 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:12,829 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] [2019-10-14 23:55:12,831 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:12,837 INFO L82 PathProgramCache]: Analyzing trace with hash -503641322, now seen corresponding path program 1 times [2019-10-14 23:55:12,847 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:12,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946051365] [2019-10-14 23:55:12,847 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:12,848 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:12,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:13,203 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 23:55:13,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946051365] [2019-10-14 23:55:13,204 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:13,205 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:55:13,205 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434101382] [2019-10-14 23:55:13,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:13,211 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:13,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:13,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:13,229 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:55:14,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:14,223 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:55:14,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:14,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 82 [2019-10-14 23:55:14,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:14,252 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:55:14,252 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:55:14,263 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 23:55:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:55:14,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:55:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:55:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 412 transitions. [2019-10-14 23:55:14,364 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 412 transitions. Word has length 82 [2019-10-14 23:55:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:14,365 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 412 transitions. [2019-10-14 23:55:14,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:14,367 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 412 transitions. [2019-10-14 23:55:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 23:55:14,379 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:14,380 INFO L380 BasicCegarLoop]: trace histogram [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 23:55:14,380 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:14,382 INFO L82 PathProgramCache]: Analyzing trace with hash 613251555, now seen corresponding path program 1 times [2019-10-14 23:55:14,382 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:14,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663666862] [2019-10-14 23:55:14,382 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:14,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:14,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:14,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:14,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663666862] [2019-10-14 23:55:14,573 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:14,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:55:14,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433208728] [2019-10-14 23:55:14,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:14,577 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:14,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:14,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:14,578 INFO L87 Difference]: Start difference. First operand 278 states and 412 transitions. Second operand 3 states. [2019-10-14 23:55:15,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:15,117 INFO L93 Difference]: Finished difference Result 820 states and 1233 transitions. [2019-10-14 23:55:15,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:15,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2019-10-14 23:55:15,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:15,124 INFO L225 Difference]: With dead ends: 820 [2019-10-14 23:55:15,124 INFO L226 Difference]: Without dead ends: 548 [2019-10-14 23:55:15,126 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 23:55:15,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2019-10-14 23:55:15,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 413. [2019-10-14 23:55:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2019-10-14 23:55:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 593 transitions. [2019-10-14 23:55:15,145 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 593 transitions. Word has length 99 [2019-10-14 23:55:15,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:15,146 INFO L462 AbstractCegarLoop]: Abstraction has 413 states and 593 transitions. [2019-10-14 23:55:15,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 593 transitions. [2019-10-14 23:55:15,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-14 23:55:15,149 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:15,149 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:15,149 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:15,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:15,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1499324049, now seen corresponding path program 1 times [2019-10-14 23:55:15,150 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:15,150 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316551677] [2019-10-14 23:55:15,150 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:15,151 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:15,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:15,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316551677] [2019-10-14 23:55:15,296 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:15,296 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:55:15,296 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051640712] [2019-10-14 23:55:15,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:55:15,297 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:15,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:55:15,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:55:15,298 INFO L87 Difference]: Start difference. First operand 413 states and 593 transitions. Second operand 6 states. [2019-10-14 23:55:16,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:16,055 INFO L93 Difference]: Finished difference Result 1116 states and 1631 transitions. [2019-10-14 23:55:16,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:55:16,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-14 23:55:16,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:16,062 INFO L225 Difference]: With dead ends: 1116 [2019-10-14 23:55:16,062 INFO L226 Difference]: Without dead ends: 709 [2019-10-14 23:55:16,064 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 23:55:16,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2019-10-14 23:55:16,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 699. [2019-10-14 23:55:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2019-10-14 23:55:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 950 transitions. [2019-10-14 23:55:16,097 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 950 transitions. Word has length 125 [2019-10-14 23:55:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:16,097 INFO L462 AbstractCegarLoop]: Abstraction has 699 states and 950 transitions. [2019-10-14 23:55:16,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:55:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 950 transitions. [2019-10-14 23:55:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 23:55:16,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:16,101 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:55:16,101 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:16,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:16,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1223806666, now seen corresponding path program 1 times [2019-10-14 23:55:16,102 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:16,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846452103] [2019-10-14 23:55:16,102 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:16,102 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:16,102 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:16,214 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:16,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846452103] [2019-10-14 23:55:16,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249970899] [2019-10-14 23:55:16,216 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 23:55:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:16,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:55:16,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:55:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:16,453 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:55:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:16,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [503306238] [2019-10-14 23:55:16,579 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 137 [2019-10-14 23:55:16,627 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:55:16,627 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)