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/Problem14_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:08:01,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:08:01,962 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:08:01,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:08:01,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:08:01,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:08:01,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:08:01,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:08:01,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:08:01,987 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:08:01,988 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:08:01,989 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:08:01,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:08:01,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:08:01,991 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:08:01,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:08:01,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:08:01,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:08:01,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:08:01,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:08:02,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:08:02,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:08:02,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:08:02,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:08:02,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:08:02,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:08:02,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:08:02,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:08:02,012 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:08:02,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:08:02,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:08:02,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:08:02,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:08:02,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:08:02,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:08:02,020 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:08:02,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:08:02,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:08:02,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:08:02,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:08:02,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:08:02,027 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 20:08:02,049 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:08:02,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:08:02,050 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:08:02,050 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:08:02,051 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:08:02,051 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:08:02,051 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:08:02,051 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:08:02,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:08:02,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:08:02,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:08:02,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:08:02,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:08:02,053 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:08:02,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:08:02,053 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:08:02,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:08:02,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:08:02,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:08:02,054 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:08:02,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:08:02,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:08:02,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:08:02,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:08:02,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:08:02,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:08:02,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:08:02,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:08:02,056 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 20:08:02,340 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:08:02,354 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:08:02,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:08:02,366 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:08:02,366 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:08:02,367 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label58.c [2019-10-13 20:08:02,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1fc5fcfc/c357c537a23243ec870cacd0b1a711b5/FLAGf5d99fc83 [2019-10-13 20:08:03,073 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:08:03,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label58.c [2019-10-13 20:08:03,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1fc5fcfc/c357c537a23243ec870cacd0b1a711b5/FLAGf5d99fc83 [2019-10-13 20:08:03,352 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1fc5fcfc/c357c537a23243ec870cacd0b1a711b5 [2019-10-13 20:08:03,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:08:03,364 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:08:03,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:08:03,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:08:03,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:08:03,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:03" (1/1) ... [2019-10-13 20:08:03,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9bc442c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:03, skipping insertion in model container [2019-10-13 20:08:03,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:03" (1/1) ... [2019-10-13 20:08:03,380 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:08:03,428 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:08:04,026 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:08:04,031 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:08:04,197 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:08:04,219 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:08:04,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:04 WrapperNode [2019-10-13 20:08:04,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:08:04,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:08:04,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:08:04,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:08:04,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:04" (1/1) ... [2019-10-13 20:08:04,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:04" (1/1) ... [2019-10-13 20:08:04,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:04" (1/1) ... [2019-10-13 20:08:04,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:04" (1/1) ... [2019-10-13 20:08:04,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:04" (1/1) ... [2019-10-13 20:08:04,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:04" (1/1) ... [2019-10-13 20:08:04,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:04" (1/1) ... [2019-10-13 20:08:04,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:08:04,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:08:04,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:08:04,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:08:04,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:04" (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 20:08:04,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:08:04,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:08:04,421 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:08:04,421 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:08:04,421 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:08:04,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:08:04,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:08:04,422 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:08:04,422 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:08:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:08:04,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:08:05,830 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:08:05,830 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:08:05,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:05 BoogieIcfgContainer [2019-10-13 20:08:05,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:08:05,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:08:05,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:08:05,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:08:05,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:08:03" (1/3) ... [2019-10-13 20:08:05,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e6ebc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:05, skipping insertion in model container [2019-10-13 20:08:05,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:04" (2/3) ... [2019-10-13 20:08:05,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e6ebc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:05, skipping insertion in model container [2019-10-13 20:08:05,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:05" (3/3) ... [2019-10-13 20:08:05,847 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label58.c [2019-10-13 20:08:05,862 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:08:05,871 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:08:05,883 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:08:05,911 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:08:05,912 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:08:05,912 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:08:05,912 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:08:05,912 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:08:05,912 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:08:05,912 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:08:05,912 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:08:05,951 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:08:05,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 20:08:05,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:05,960 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] [2019-10-13 20:08:05,961 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:05,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:05,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1699451235, now seen corresponding path program 1 times [2019-10-13 20:08:05,974 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:05,974 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033702109] [2019-10-13 20:08:05,974 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:05,974 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:05,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:06,182 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 20:08:06,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033702109] [2019-10-13 20:08:06,184 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:06,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:08:06,185 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768448328] [2019-10-13 20:08:06,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:08:06,192 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:06,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:08:06,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:06,210 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-13 20:08:08,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:08,066 INFO L93 Difference]: Finished difference Result 890 states and 1607 transitions. [2019-10-13 20:08:08,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:08:08,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-13 20:08:08,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:08,089 INFO L225 Difference]: With dead ends: 890 [2019-10-13 20:08:08,089 INFO L226 Difference]: Without dead ends: 554 [2019-10-13 20:08:08,098 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:08,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-13 20:08:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-13 20:08:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-13 20:08:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 806 transitions. [2019-10-13 20:08:08,187 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 806 transitions. Word has length 20 [2019-10-13 20:08:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:08,187 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 806 transitions. [2019-10-13 20:08:08,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:08:08,188 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 806 transitions. [2019-10-13 20:08:08,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 20:08:08,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:08,195 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:08:08,195 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:08,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:08,196 INFO L82 PathProgramCache]: Analyzing trace with hash 72862738, now seen corresponding path program 1 times [2019-10-13 20:08:08,196 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:08,196 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612700376] [2019-10-13 20:08:08,196 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:08,197 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:08,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:08,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:08,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612700376] [2019-10-13 20:08:08,464 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:08,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:08:08,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065775822] [2019-10-13 20:08:08,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:08:08,467 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:08,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:08:08,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:08,468 INFO L87 Difference]: Start difference. First operand 554 states and 806 transitions. Second operand 4 states. [2019-10-13 20:08:10,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:10,099 INFO L93 Difference]: Finished difference Result 2194 states and 3252 transitions. [2019-10-13 20:08:10,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:08:10,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 132 [2019-10-13 20:08:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:10,118 INFO L225 Difference]: With dead ends: 2194 [2019-10-13 20:08:10,119 INFO L226 Difference]: Without dead ends: 1646 [2019-10-13 20:08:10,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:10,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-10-13 20:08:10,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1646. [2019-10-13 20:08:10,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1646 states. [2019-10-13 20:08:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1646 states to 1646 states and 2291 transitions. [2019-10-13 20:08:10,221 INFO L78 Accepts]: Start accepts. Automaton has 1646 states and 2291 transitions. Word has length 132 [2019-10-13 20:08:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:10,222 INFO L462 AbstractCegarLoop]: Abstraction has 1646 states and 2291 transitions. [2019-10-13 20:08:10,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:08:10,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1646 states and 2291 transitions. [2019-10-13 20:08:10,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-13 20:08:10,231 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:10,231 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 20:08:10,231 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:10,232 INFO L82 PathProgramCache]: Analyzing trace with hash -700382803, now seen corresponding path program 1 times [2019-10-13 20:08:10,233 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:10,233 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831788741] [2019-10-13 20:08:10,233 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:10,233 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:10,233 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:10,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831788741] [2019-10-13 20:08:10,396 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:10,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:08:10,396 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166362715] [2019-10-13 20:08:10,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:08:10,397 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:10,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:08:10,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:10,398 INFO L87 Difference]: Start difference. First operand 1646 states and 2291 transitions. Second operand 4 states. [2019-10-13 20:08:11,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:11,792 INFO L93 Difference]: Finished difference Result 5652 states and 8154 transitions. [2019-10-13 20:08:11,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:08:11,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2019-10-13 20:08:11,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:11,819 INFO L225 Difference]: With dead ends: 5652 [2019-10-13 20:08:11,819 INFO L226 Difference]: Without dead ends: 4012 [2019-10-13 20:08:11,824 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:11,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4012 states. [2019-10-13 20:08:11,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4012 to 3830. [2019-10-13 20:08:11,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3830 states. [2019-10-13 20:08:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 5244 transitions. [2019-10-13 20:08:11,940 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 5244 transitions. Word has length 153 [2019-10-13 20:08:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:11,941 INFO L462 AbstractCegarLoop]: Abstraction has 3830 states and 5244 transitions. [2019-10-13 20:08:11,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:08:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 5244 transitions. [2019-10-13 20:08:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-10-13 20:08:11,952 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:11,953 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:08:11,953 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:11,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:11,953 INFO L82 PathProgramCache]: Analyzing trace with hash -763160813, now seen corresponding path program 1 times [2019-10-13 20:08:11,954 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:11,954 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903368413] [2019-10-13 20:08:11,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:11,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:11,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 114 proven. 86 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 20:08:12,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903368413] [2019-10-13 20:08:12,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749380529] [2019-10-13 20:08:12,863 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 20:08:12,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:12,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:08:13,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:13,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-13 20:08:13,291 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:13,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:13,446 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:13,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:13,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:13,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 39 proven. 138 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 20:08:13,776 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:08:13,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2019-10-13 20:08:13,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066806541] [2019-10-13 20:08:13,777 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:08:13,778 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:13,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:08:13,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-10-13 20:08:13,779 INFO L87 Difference]: Start difference. First operand 3830 states and 5244 transitions. Second operand 5 states. [2019-10-13 20:08:15,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:15,091 INFO L93 Difference]: Finished difference Result 7892 states and 10846 transitions. [2019-10-13 20:08:15,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:08:15,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 309 [2019-10-13 20:08:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:15,118 INFO L225 Difference]: With dead ends: 7892 [2019-10-13 20:08:15,118 INFO L226 Difference]: Without dead ends: 4250 [2019-10-13 20:08:15,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 631 GetRequests, 613 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2019-10-13 20:08:15,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4250 states. [2019-10-13 20:08:15,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4250 to 3332. [2019-10-13 20:08:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3332 states. [2019-10-13 20:08:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 4463 transitions. [2019-10-13 20:08:15,235 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 4463 transitions. Word has length 309 [2019-10-13 20:08:15,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:15,236 INFO L462 AbstractCegarLoop]: Abstraction has 3332 states and 4463 transitions. [2019-10-13 20:08:15,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:08:15,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 4463 transitions. [2019-10-13 20:08:15,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-10-13 20:08:15,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:15,245 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:08:15,450 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:08:15,451 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:15,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:15,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1030212280, now seen corresponding path program 1 times [2019-10-13 20:08:15,452 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:15,452 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907472512] [2019-10-13 20:08:15,452 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:15,452 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:15,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:15,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 125 proven. 164 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:08:16,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907472512] [2019-10-13 20:08:16,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306437961] [2019-10-13 20:08:16,292 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 [2019-10-13 20:08:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:16,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:08:16,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:16,492 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:08:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 226 proven. 53 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 20:08:16,689 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:16,756 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:08:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 47 proven. 242 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:08:17,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1479645149] [2019-10-13 20:08:17,240 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 321 [2019-10-13 20:08:17,290 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:08:17,291 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:08:33,940 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:08:33,942 INFO L272 AbstractInterpreter]: Visited 139 different actions 273 times. Merged at 4 different actions 5 times. Never widened. Performed 539 root evaluator evaluations with a maximum evaluation depth of 13. Performed 539 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-13 20:08:33,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:33,946 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:08:38,818 INFO L227 lantSequenceWeakener]: Weakened 317 states. On average, predicates are now at 77.32% of their original sizes. [2019-10-13 20:08:38,818 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:08:38,893 INFO L553 sIntCurrentIteration]: We unified 319 AI predicates to 319 [2019-10-13 20:08:38,893 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:08:38,894 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:08:38,895 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 8, 8] total 29 [2019-10-13 20:08:38,895 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987566869] [2019-10-13 20:08:38,896 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 20:08:38,896 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:38,897 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:08:38,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 20:08:38,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:08:38,897 INFO L87 Difference]: Start difference. First operand 3332 states and 4463 transitions. Second operand 11 states.