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/Problem16_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:09:23,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:09:23,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:09:23,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:09:23,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:09:23,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:09:23,224 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:09:23,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:09:23,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:09:23,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:09:23,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:09:23,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:09:23,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:09:23,232 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:09:23,233 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:09:23,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:09:23,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:09:23,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:09:23,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:09:23,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:09:23,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:09:23,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:09:23,243 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:09:23,244 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:09:23,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 00:09:23,246 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 00:09:23,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 00:09:23,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 00:09:23,248 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 00:09:23,249 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 00:09:23,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:09:23,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:09:23,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:09:23,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:09:23,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:09:23,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:09:23,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:09:23,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:09:23,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:09:23,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:09:23,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:09:23,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:09:23,276 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:09:23,277 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:09:23,279 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:09:23,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:09:23,280 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:09:23,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:09:23,280 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:09:23,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:09:23,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:09:23,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:09:23,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:09:23,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:09:23,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:09:23,281 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:09:23,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:09:23,282 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:09:23,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:09:23,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:09:23,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:09:23,283 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:09:23,283 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:09:23,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:23,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:09:23,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:09:23,284 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:09:23,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:09:23,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:09:23,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:09:23,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:09:23,571 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:09:23,591 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:09:23,596 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:09:23,597 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:09:23,598 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:09:23,598 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-10-15 00:09:23,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ba6d657/0633de7c123a4315b538083eb4a903b3/FLAG152e927a5 [2019-10-15 00:09:24,360 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:09:24,361 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-10-15 00:09:24,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ba6d657/0633de7c123a4315b538083eb4a903b3/FLAG152e927a5 [2019-10-15 00:09:24,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7ba6d657/0633de7c123a4315b538083eb4a903b3 [2019-10-15 00:09:24,499 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:09:24,500 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:09:24,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:24,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:09:24,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:09:24,510 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:24" (1/1) ... [2019-10-15 00:09:24,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67122e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:24, skipping insertion in model container [2019-10-15 00:09:24,514 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:24" (1/1) ... [2019-10-15 00:09:24,524 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:09:24,609 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:09:25,696 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:25,705 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:09:25,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:25,992 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:09:25,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:25 WrapperNode [2019-10-15 00:09:25,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:25,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:09:25,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:09:25,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:09:26,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:25" (1/1) ... [2019-10-15 00:09:26,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:25" (1/1) ... [2019-10-15 00:09:26,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:25" (1/1) ... [2019-10-15 00:09:26,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:25" (1/1) ... [2019-10-15 00:09:26,123 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:25" (1/1) ... [2019-10-15 00:09:26,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:25" (1/1) ... [2019-10-15 00:09:26,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:25" (1/1) ... [2019-10-15 00:09:26,195 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:09:26,196 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:09:26,196 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:09:26,196 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:09:26,198 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:26,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:09:26,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:09:26,290 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:09:26,290 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:09:26,290 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:09:26,291 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:09:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:09:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:09:26,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:09:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:09:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:09:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:09:26,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:09:28,737 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:09:28,738 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:09:28,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:28 BoogieIcfgContainer [2019-10-15 00:09:28,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:09:28,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:09:28,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:09:28,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:09:28,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:24" (1/3) ... [2019-10-15 00:09:28,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b70fe05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:28, skipping insertion in model container [2019-10-15 00:09:28,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:25" (2/3) ... [2019-10-15 00:09:28,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b70fe05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:28, skipping insertion in model container [2019-10-15 00:09:28,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:28" (3/3) ... [2019-10-15 00:09:28,749 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label55.c [2019-10-15 00:09:28,760 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:09:28,769 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:09:28,781 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:09:28,812 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:09:28,813 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:09:28,813 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:09:28,813 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:09:28,813 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:09:28,813 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:09:28,814 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:09:28,814 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:09:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:09:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 00:09:28,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:28,854 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] [2019-10-15 00:09:28,856 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:28,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:28,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1859248590, now seen corresponding path program 1 times [2019-10-15 00:09:28,875 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:28,875 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107784679] [2019-10-15 00:09:28,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:28,876 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:28,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:29,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:29,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107784679] [2019-10-15 00:09:29,253 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:29,253 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:09:29,254 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958731587] [2019-10-15 00:09:29,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:09:29,261 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:29,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:09:29,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:09:29,279 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:09:31,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:31,585 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:09:31,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:09:31,587 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2019-10-15 00:09:31,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:31,608 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:09:31,609 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:09:31,621 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:09:31,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:09:31,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:09:31,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:09:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-10-15 00:09:31,731 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 63 [2019-10-15 00:09:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:31,732 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-10-15 00:09:31,732 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:09:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-10-15 00:09:31,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-15 00:09:31,739 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:31,740 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, 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] [2019-10-15 00:09:31,740 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:31,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1824970078, now seen corresponding path program 1 times [2019-10-15 00:09:31,741 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:31,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878623833] [2019-10-15 00:09:31,741 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:31,742 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:31,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:32,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878623833] [2019-10-15 00:09:32,051 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:32,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:32,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515134247] [2019-10-15 00:09:32,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:32,054 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:32,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:32,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:32,054 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-10-15 00:09:34,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:34,919 INFO L93 Difference]: Finished difference Result 1730 states and 3016 transitions. [2019-10-15 00:09:34,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:34,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-10-15 00:09:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:34,929 INFO L225 Difference]: With dead ends: 1730 [2019-10-15 00:09:34,930 INFO L226 Difference]: Without dead ends: 1054 [2019-10-15 00:09:34,933 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:09:34,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-10-15 00:09:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-10-15 00:09:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-10-15 00:09:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-10-15 00:09:34,979 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 155 [2019-10-15 00:09:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:34,980 INFO L462 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-10-15 00:09:34,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:34,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-10-15 00:09:34,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-10-15 00:09:34,986 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:34,986 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:34,987 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:34,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:34,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1909961266, now seen corresponding path program 1 times [2019-10-15 00:09:34,988 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:34,988 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819956807] [2019-10-15 00:09:34,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:34,988 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:34,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 112 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:09:35,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819956807] [2019-10-15 00:09:35,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571276452] [2019-10-15 00:09:35,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:35,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:35,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-15 00:09:35,679 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 112 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:09:35,946 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:35,947 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:09:35,947 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620835844] [2019-10-15 00:09:35,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:35,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:35,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:35,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:09:35,960 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 5 states. [2019-10-15 00:09:39,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:39,341 INFO L93 Difference]: Finished difference Result 2427 states and 3968 transitions. [2019-10-15 00:09:39,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:39,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 265 [2019-10-15 00:09:39,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:39,355 INFO L225 Difference]: With dead ends: 2427 [2019-10-15 00:09:39,355 INFO L226 Difference]: Without dead ends: 1399 [2019-10-15 00:09:39,358 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 525 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:09:39,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2019-10-15 00:09:39,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1388. [2019-10-15 00:09:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2019-10-15 00:09:39,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2182 transitions. [2019-10-15 00:09:39,420 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2182 transitions. Word has length 265 [2019-10-15 00:09:39,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:39,421 INFO L462 AbstractCegarLoop]: Abstraction has 1388 states and 2182 transitions. [2019-10-15 00:09:39,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:39,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2182 transitions. [2019-10-15 00:09:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2019-10-15 00:09:39,431 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:39,431 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:39,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:39,638 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash -495791769, now seen corresponding path program 1 times [2019-10-15 00:09:39,639 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:39,639 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369941928] [2019-10-15 00:09:39,640 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:39,640 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:39,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:39,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 168 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:40,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369941928] [2019-10-15 00:09:40,117 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938987311] [2019-10-15 00:09:40,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:40,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:40,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2019-10-15 00:09:40,433 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 168 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:40,835 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:40,836 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-15 00:09:40,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012079312] [2019-10-15 00:09:40,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:40,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:40,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:40,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:09:40,840 INFO L87 Difference]: Start difference. First operand 1388 states and 2182 transitions. Second operand 5 states. [2019-10-15 00:09:44,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:44,353 INFO L93 Difference]: Finished difference Result 4241 states and 6810 transitions. [2019-10-15 00:09:44,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:09:44,354 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 340 [2019-10-15 00:09:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:44,374 INFO L225 Difference]: With dead ends: 4241 [2019-10-15 00:09:44,374 INFO L226 Difference]: Without dead ends: 2859 [2019-10-15 00:09:44,380 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 678 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:09:44,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2019-10-15 00:09:44,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2819. [2019-10-15 00:09:44,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-10-15 00:09:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4287 transitions. [2019-10-15 00:09:44,489 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4287 transitions. Word has length 340 [2019-10-15 00:09:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:44,489 INFO L462 AbstractCegarLoop]: Abstraction has 2819 states and 4287 transitions. [2019-10-15 00:09:44,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4287 transitions. [2019-10-15 00:09:44,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2019-10-15 00:09:44,497 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:44,497 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:44,702 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:44,702 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:44,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1063616465, now seen corresponding path program 1 times [2019-10-15 00:09:44,703 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:44,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711879016] [2019-10-15 00:09:44,704 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:44,704 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:44,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:45,021 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 168 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:45,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711879016] [2019-10-15 00:09:45,021 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110339958] [2019-10-15 00:09:45,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:45,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:09:45,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2019-10-15 00:09:45,219 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 168 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-15 00:09:45,398 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:09:45,398 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:09:45,398 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463627699] [2019-10-15 00:09:45,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:45,400 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:45,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:45,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:09:45,400 INFO L87 Difference]: Start difference. First operand 2819 states and 4287 transitions. Second operand 5 states. [2019-10-15 00:09:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:48,081 INFO L93 Difference]: Finished difference Result 8487 states and 13372 transitions. [2019-10-15 00:09:48,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:09:48,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 344 [2019-10-15 00:09:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:48,125 INFO L225 Difference]: With dead ends: 8487 [2019-10-15 00:09:48,125 INFO L226 Difference]: Without dead ends: 5674 [2019-10-15 00:09:48,135 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 683 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:09:48,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2019-10-15 00:09:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5640. [2019-10-15 00:09:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2019-10-15 00:09:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7783 transitions. [2019-10-15 00:09:48,317 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7783 transitions. Word has length 344 [2019-10-15 00:09:48,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:48,322 INFO L462 AbstractCegarLoop]: Abstraction has 5640 states and 7783 transitions. [2019-10-15 00:09:48,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:48,322 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7783 transitions. [2019-10-15 00:09:48,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2019-10-15 00:09:48,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:48,332 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:48,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:48,545 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:48,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1181974966, now seen corresponding path program 1 times [2019-10-15 00:09:48,547 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:48,547 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928598163] [2019-10-15 00:09:48,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:48,548 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:48,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:49,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928598163] [2019-10-15 00:09:49,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542026431] [2019-10-15 00:09:49,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:49,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:49,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:49,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:50,068 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:50,333 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:50,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1623530320] [2019-10-15 00:09:50,340 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 370 [2019-10-15 00:09:50,401 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:09:50,402 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:09:54,721 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.