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/Problem10_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:03:04,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:03:04,051 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:03:04,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:03:04,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:03:04,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:03:04,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:03:04,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:03:04,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:03:04,095 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:03:04,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:03:04,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:03:04,098 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:03:04,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:03:04,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:03:04,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:03:04,106 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:03:04,107 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:03:04,108 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:03:04,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:03:04,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:03:04,120 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:03:04,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:03:04,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:03:04,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:03:04,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:03:04,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:03:04,132 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:03:04,133 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:03:04,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:03:04,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:03:04,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:03:04,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:03:04,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:03:04,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:03:04,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:03:04,139 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 [2019-10-13 20:03:04,170 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:03:04,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:03:04,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:03:04,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:03:04,174 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:03:04,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:03:04,175 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:03:04,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:03:04,177 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:03:04,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:03:04,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:03:04,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:03:04,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:03:04,178 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:03:04,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:03:04,179 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:03:04,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:03:04,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:03:04,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:03:04,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:03:04,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:03:04,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:03:04,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:03:04,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:03:04,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:03:04,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:03:04,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:03:04,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:03:04,181 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 [2019-10-13 20:03:04,481 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:03:04,495 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:03:04,499 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:03:04,500 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:03:04,501 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:03:04,501 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label48.c [2019-10-13 20:03:04,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e984b216/7b31bc80f70848268854e30420db20b0/FLAGc52b59f35 [2019-10-13 20:03:05,188 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:03:05,189 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label48.c [2019-10-13 20:03:05,211 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e984b216/7b31bc80f70848268854e30420db20b0/FLAGc52b59f35 [2019-10-13 20:03:05,426 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e984b216/7b31bc80f70848268854e30420db20b0 [2019-10-13 20:03:05,437 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:03:05,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:03:05,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:05,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:03:05,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:03:05,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:05" (1/1) ... [2019-10-13 20:03:05,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@100f17a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:05, skipping insertion in model container [2019-10-13 20:03:05,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:05" (1/1) ... [2019-10-13 20:03:05,456 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:03:05,513 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:03:06,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:06,072 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:03:06,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:06,225 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:03:06,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:06 WrapperNode [2019-10-13 20:03:06,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:06,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:03:06,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:03:06,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:03:06,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:06" (1/1) ... [2019-10-13 20:03:06,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:06" (1/1) ... [2019-10-13 20:03:06,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:06" (1/1) ... [2019-10-13 20:03:06,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:06" (1/1) ... [2019-10-13 20:03:06,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:06" (1/1) ... [2019-10-13 20:03:06,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:06" (1/1) ... [2019-10-13 20:03:06,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:06" (1/1) ... [2019-10-13 20:03:06,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:03:06,339 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:03:06,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:03:06,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:03:06,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:06" (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 [2019-10-13 20:03:06,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:03:06,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:03:06,417 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:03:06,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:03:06,417 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:03:06,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:03:06,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:03:06,418 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:03:06,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:03:06,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:03:06,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:03:07,833 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:03:07,833 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:03:07,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:07 BoogieIcfgContainer [2019-10-13 20:03:07,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:03:07,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:03:07,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:03:07,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:03:07,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:03:05" (1/3) ... [2019-10-13 20:03:07,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27318ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:07, skipping insertion in model container [2019-10-13 20:03:07,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:06" (2/3) ... [2019-10-13 20:03:07,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27318ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:07, skipping insertion in model container [2019-10-13 20:03:07,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:07" (3/3) ... [2019-10-13 20:03:07,847 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label48.c [2019-10-13 20:03:07,857 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:03:07,867 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:03:07,878 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:03:07,917 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:03:07,918 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:03:07,919 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:03:07,919 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:03:07,919 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:03:07,919 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:03:07,920 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:03:07,920 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:03:07,949 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 20:03:07,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 20:03:07,954 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:07,955 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:07,957 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:07,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:07,962 INFO L82 PathProgramCache]: Analyzing trace with hash 54045006, now seen corresponding path program 1 times [2019-10-13 20:03:07,968 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:07,969 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868553107] [2019-10-13 20:03:07,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:07,969 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:07,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:08,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868553107] [2019-10-13 20:03:08,189 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:08,189 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:03:08,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899990708] [2019-10-13 20:03:08,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:03:08,197 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:08,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:03:08,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:03:08,215 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-13 20:03:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:09,231 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-13 20:03:09,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:03:09,235 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-13 20:03:09,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:09,260 INFO L225 Difference]: With dead ends: 571 [2019-10-13 20:03:09,261 INFO L226 Difference]: Without dead ends: 294 [2019-10-13 20:03:09,272 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 [2019-10-13 20:03:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-13 20:03:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-13 20:03:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-13 20:03:09,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-13 20:03:09,357 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 13 [2019-10-13 20:03:09,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:09,358 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-13 20:03:09,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:03:09,358 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-13 20:03:09,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 20:03:09,361 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:09,362 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:03:09,362 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:09,362 INFO L82 PathProgramCache]: Analyzing trace with hash 58156773, now seen corresponding path program 1 times [2019-10-13 20:03:09,362 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:09,363 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032242038] [2019-10-13 20:03:09,363 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:09,363 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:09,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:09,657 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032242038] [2019-10-13 20:03:09,658 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:09,658 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:03:09,658 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131949748] [2019-10-13 20:03:09,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:03:09,661 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:09,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:03:09,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:03:09,662 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 6 states. [2019-10-13 20:03:10,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:10,495 INFO L93 Difference]: Finished difference Result 741 states and 1136 transitions. [2019-10-13 20:03:10,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:03:10,495 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2019-10-13 20:03:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:10,499 INFO L225 Difference]: With dead ends: 741 [2019-10-13 20:03:10,499 INFO L226 Difference]: Without dead ends: 453 [2019-10-13 20:03:10,501 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 [2019-10-13 20:03:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2019-10-13 20:03:10,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2019-10-13 20:03:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445 states. [2019-10-13 20:03:10,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 626 transitions. [2019-10-13 20:03:10,529 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 626 transitions. Word has length 86 [2019-10-13 20:03:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:10,530 INFO L462 AbstractCegarLoop]: Abstraction has 445 states and 626 transitions. [2019-10-13 20:03:10,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:03:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 626 transitions. [2019-10-13 20:03:10,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-13 20:03:10,533 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:10,534 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:03:10,534 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:10,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:10,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1907689263, now seen corresponding path program 1 times [2019-10-13 20:03:10,535 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:10,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074203060] [2019-10-13 20:03:10,535 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:10,535 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:10,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:10,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074203060] [2019-10-13 20:03:10,645 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:10,645 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:03:10,646 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065850847] [2019-10-13 20:03:10,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:03:10,647 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:10,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:03:10,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:03:10,647 INFO L87 Difference]: Start difference. First operand 445 states and 626 transitions. Second operand 3 states. [2019-10-13 20:03:11,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:11,276 INFO L93 Difference]: Finished difference Result 1319 states and 1891 transitions. [2019-10-13 20:03:11,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:03:11,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2019-10-13 20:03:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:11,282 INFO L225 Difference]: With dead ends: 1319 [2019-10-13 20:03:11,283 INFO L226 Difference]: Without dead ends: 880 [2019-10-13 20:03:11,284 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:03:11,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2019-10-13 20:03:11,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2019-10-13 20:03:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2019-10-13 20:03:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1152 transitions. [2019-10-13 20:03:11,328 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1152 transitions. Word has length 92 [2019-10-13 20:03:11,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:11,329 INFO L462 AbstractCegarLoop]: Abstraction has 880 states and 1152 transitions. [2019-10-13 20:03:11,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:03:11,329 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1152 transitions. [2019-10-13 20:03:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-13 20:03:11,332 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:11,332 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:03:11,332 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1492328462, now seen corresponding path program 1 times [2019-10-13 20:03:11,333 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:11,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117351700] [2019-10-13 20:03:11,334 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:11,334 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:11,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:11,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117351700] [2019-10-13 20:03:11,457 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:11,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:03:11,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412094511] [2019-10-13 20:03:11,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:03:11,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:11,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:03:11,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:03:11,459 INFO L87 Difference]: Start difference. First operand 880 states and 1152 transitions. Second operand 6 states. [2019-10-13 20:03:12,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:12,436 INFO L93 Difference]: Finished difference Result 2078 states and 2807 transitions. [2019-10-13 20:03:12,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:03:12,436 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2019-10-13 20:03:12,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:12,444 INFO L225 Difference]: With dead ends: 2078 [2019-10-13 20:03:12,445 INFO L226 Difference]: Without dead ends: 1204 [2019-10-13 20:03:12,447 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 [2019-10-13 20:03:12,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2019-10-13 20:03:12,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1192. [2019-10-13 20:03:12,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-10-13 20:03:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1576 transitions. [2019-10-13 20:03:12,495 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1576 transitions. Word has length 103 [2019-10-13 20:03:12,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:12,496 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1576 transitions. [2019-10-13 20:03:12,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:03:12,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1576 transitions. [2019-10-13 20:03:12,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 20:03:12,500 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:12,500 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:03:12,501 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:12,501 INFO L82 PathProgramCache]: Analyzing trace with hash -28083010, now seen corresponding path program 1 times [2019-10-13 20:03:12,501 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:12,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368305818] [2019-10-13 20:03:12,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:12,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:12,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:12,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368305818] [2019-10-13 20:03:12,777 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:12,777 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:03:12,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012276428] [2019-10-13 20:03:12,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:03:12,779 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:12,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:03:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:03:12,781 INFO L87 Difference]: Start difference. First operand 1192 states and 1576 transitions. Second operand 6 states. [2019-10-13 20:03:13,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:13,678 INFO L93 Difference]: Finished difference Result 2688 states and 3628 transitions. [2019-10-13 20:03:13,681 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:03:13,681 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 125 [2019-10-13 20:03:13,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:13,693 INFO L225 Difference]: With dead ends: 2688 [2019-10-13 20:03:13,694 INFO L226 Difference]: Without dead ends: 1502 [2019-10-13 20:03:13,699 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 [2019-10-13 20:03:13,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2019-10-13 20:03:13,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1339. [2019-10-13 20:03:13,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2019-10-13 20:03:13,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 1748 transitions. [2019-10-13 20:03:13,773 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 1748 transitions. Word has length 125 [2019-10-13 20:03:13,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:13,774 INFO L462 AbstractCegarLoop]: Abstraction has 1339 states and 1748 transitions. [2019-10-13 20:03:13,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:03:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 1748 transitions. [2019-10-13 20:03:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 20:03:13,778 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:13,778 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:13,779 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:13,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:13,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1911741586, now seen corresponding path program 1 times [2019-10-13 20:03:13,780 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:13,780 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124546944] [2019-10-13 20:03:13,780 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:13,780 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:13,780 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:13,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124546944] [2019-10-13 20:03:13,982 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:13,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:03:13,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745029379] [2019-10-13 20:03:13,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:03:13,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:13,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:03:13,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:03:13,984 INFO L87 Difference]: Start difference. First operand 1339 states and 1748 transitions. Second operand 6 states. [2019-10-13 20:03:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:14,885 INFO L93 Difference]: Finished difference Result 2692 states and 3545 transitions. [2019-10-13 20:03:14,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:03:14,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 149 [2019-10-13 20:03:14,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:14,893 INFO L225 Difference]: With dead ends: 2692 [2019-10-13 20:03:14,893 INFO L226 Difference]: Without dead ends: 1359 [2019-10-13 20:03:14,898 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 [2019-10-13 20:03:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2019-10-13 20:03:14,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1204. [2019-10-13 20:03:14,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1204 states. [2019-10-13 20:03:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 1482 transitions. [2019-10-13 20:03:14,938 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 1482 transitions. Word has length 149 [2019-10-13 20:03:14,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:14,938 INFO L462 AbstractCegarLoop]: Abstraction has 1204 states and 1482 transitions. [2019-10-13 20:03:14,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:03:14,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 1482 transitions. [2019-10-13 20:03:14,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-10-13 20:03:14,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:14,943 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 20:03:14,944 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:14,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:14,944 INFO L82 PathProgramCache]: Analyzing trace with hash -782626831, now seen corresponding path program 1 times [2019-10-13 20:03:14,944 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:14,945 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955070993] [2019-10-13 20:03:14,945 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:14,945 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:14,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:15,257 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-13 20:03:15,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955070993] [2019-10-13 20:03:15,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654147042] [2019-10-13 20:03:15,259 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 [2019-10-13 20:03:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:15,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:03:15,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:15,578 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:15,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [897532180] [2019-10-13 20:03:15,869 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 229 [2019-10-13 20:03:15,934 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:03:15,934 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:03:28,384 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.