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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:01,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:01,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:01,963 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:07:01,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:07:01,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:07:01,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:07:01,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:07:01,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:07:01,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:07:01,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:07:01,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:07:01,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:01,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:01,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:01,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:01,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:01,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:01,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:01,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:01,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:01,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:01,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:01,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:01,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:07:01,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:07:01,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:07:01,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:07:01,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:07:01,993 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:07:01,993 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:07:01,994 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:07:01,994 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:07:01,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:01,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:01,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:01,997 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 20:07:02,011 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:02,011 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:02,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:02,012 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:02,012 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:02,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:02,013 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:02,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:02,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:02,014 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:02,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:02,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:02,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:02,014 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:02,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:02,015 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:02,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:02,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:02,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:02,016 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:02,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:02,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:02,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:02,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:02,017 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:02,017 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:02,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:02,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:02,017 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 20:07:02,357 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:02,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:02,377 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:02,379 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:02,379 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:02,380 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2019-10-13 20:07:02,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11f669f44/aba45c8c8c354c46b228243f43ad5a7e/FLAGf0fb687be [2019-10-13 20:07:03,036 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:03,038 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label24.c [2019-10-13 20:07:03,058 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11f669f44/aba45c8c8c354c46b228243f43ad5a7e/FLAGf0fb687be [2019-10-13 20:07:03,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11f669f44/aba45c8c8c354c46b228243f43ad5a7e [2019-10-13 20:07:03,343 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:03,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:03,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:03,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:03,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:03,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:03" (1/1) ... [2019-10-13 20:07:03,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb457ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:03, skipping insertion in model container [2019-10-13 20:07:03,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:03" (1/1) ... [2019-10-13 20:07:03,364 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:03,424 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:03,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:03,977 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:04,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:04,129 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:04,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:04 WrapperNode [2019-10-13 20:07:04,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:04,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:04,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:04,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:04,152 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:04" (1/1) ... [2019-10-13 20:07:04,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:04" (1/1) ... [2019-10-13 20:07:04,192 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:04" (1/1) ... [2019-10-13 20:07:04,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:04" (1/1) ... [2019-10-13 20:07:04,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:04" (1/1) ... [2019-10-13 20:07:04,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:04" (1/1) ... [2019-10-13 20:07:04,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:04" (1/1) ... [2019-10-13 20:07:04,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:04,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:04,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:04,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:04,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:04" (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 20:07:04,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:04,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:04,424 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:04,424 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:04,424 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:04,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:04,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:04,425 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:04,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:04,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:04,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:06,038 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:06,038 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:06,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:06 BoogieIcfgContainer [2019-10-13 20:07:06,040 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:06,041 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:06,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:06,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:06,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:03" (1/3) ... [2019-10-13 20:07:06,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70746607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:06, skipping insertion in model container [2019-10-13 20:07:06,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:04" (2/3) ... [2019-10-13 20:07:06,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70746607 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:06, skipping insertion in model container [2019-10-13 20:07:06,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:06" (3/3) ... [2019-10-13 20:07:06,048 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label24.c [2019-10-13 20:07:06,058 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:06,066 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:06,077 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:06,104 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:06,105 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:06,105 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:06,105 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:06,105 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:06,105 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:06,106 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:06,106 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:06,129 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:06,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 20:07:06,137 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:06,138 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:06,140 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:06,146 INFO L82 PathProgramCache]: Analyzing trace with hash 2116109586, now seen corresponding path program 1 times [2019-10-13 20:07:06,155 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:06,155 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830019559] [2019-10-13 20:07:06,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:06,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:06,156 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:06,412 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 20:07:06,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830019559] [2019-10-13 20:07:06,414 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:06,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:07:06,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954975185] [2019-10-13 20:07:06,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:07:06,421 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:06,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:07:06,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:06,438 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-13 20:07:07,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:07,699 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-13 20:07:07,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:07:07,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2019-10-13 20:07:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:07,733 INFO L225 Difference]: With dead ends: 688 [2019-10-13 20:07:07,733 INFO L226 Difference]: Without dead ends: 372 [2019-10-13 20:07:07,745 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:07,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-13 20:07:07,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-13 20:07:07,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:07:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-13 20:07:07,856 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 47 [2019-10-13 20:07:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:07,857 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-13 20:07:07,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:07:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-13 20:07:07,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 20:07:07,863 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:07,863 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:07,863 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:07,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:07,864 INFO L82 PathProgramCache]: Analyzing trace with hash -1939521290, now seen corresponding path program 1 times [2019-10-13 20:07:07,864 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:07,864 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833235126] [2019-10-13 20:07:07,865 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:07,865 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:07,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:08,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833235126] [2019-10-13 20:07:08,130 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:08,130 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:07:08,130 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503152004] [2019-10-13 20:07:08,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:07:08,132 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:08,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:07:08,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:07:08,133 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-13 20:07:09,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:09,379 INFO L93 Difference]: Finished difference Result 936 states and 1526 transitions. [2019-10-13 20:07:09,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:07:09,380 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 121 [2019-10-13 20:07:09,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:09,384 INFO L225 Difference]: With dead ends: 936 [2019-10-13 20:07:09,384 INFO L226 Difference]: Without dead ends: 570 [2019-10-13 20:07:09,386 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 20:07:09,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-10-13 20:07:09,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-10-13 20:07:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-10-13 20:07:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-10-13 20:07:09,416 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 121 [2019-10-13 20:07:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:09,417 INFO L462 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-10-13 20:07:09,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:07:09,417 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-10-13 20:07:09,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-13 20:07:09,420 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:09,421 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:09,421 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:09,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2114473467, now seen corresponding path program 1 times [2019-10-13 20:07:09,422 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:09,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361901029] [2019-10-13 20:07:09,422 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:09,422 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:09,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:09,595 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:09,595 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361901029] [2019-10-13 20:07:09,596 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:09,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:09,597 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547097498] [2019-10-13 20:07:09,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:09,599 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:09,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:09,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:09,599 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-10-13 20:07:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:11,121 INFO L93 Difference]: Finished difference Result 2216 states and 3272 transitions. [2019-10-13 20:07:11,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:11,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-13 20:07:11,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:11,132 INFO L225 Difference]: With dead ends: 2216 [2019-10-13 20:07:11,132 INFO L226 Difference]: Without dead ends: 1660 [2019-10-13 20:07:11,134 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 20:07:11,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1660 states. [2019-10-13 20:07:11,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1660 to 1476. [2019-10-13 20:07:11,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1476 states. [2019-10-13 20:07:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 2051 transitions. [2019-10-13 20:07:11,186 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 2051 transitions. Word has length 130 [2019-10-13 20:07:11,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:11,187 INFO L462 AbstractCegarLoop]: Abstraction has 1476 states and 2051 transitions. [2019-10-13 20:07:11,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:11,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 2051 transitions. [2019-10-13 20:07:11,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-10-13 20:07:11,201 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:11,202 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 20:07:11,202 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:11,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:11,203 INFO L82 PathProgramCache]: Analyzing trace with hash 511372486, now seen corresponding path program 1 times [2019-10-13 20:07:11,203 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:11,203 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676321898] [2019-10-13 20:07:11,204 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:11,204 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:11,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 111 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:11,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676321898] [2019-10-13 20:07:11,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339383409] [2019-10-13 20:07:11,806 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 20:07:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:11,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:07:11,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:11,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 20:07:12,141 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:12,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:12,311 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:12,313 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:12,314 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:12,335 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:12,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:07:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 80 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:12,658 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:07:12,658 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2019-10-13 20:07:12,658 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594809515] [2019-10-13 20:07:12,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:07:12,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:12,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:07:12,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-10-13 20:07:12,660 INFO L87 Difference]: Start difference. First operand 1476 states and 2051 transitions. Second operand 5 states. [2019-10-13 20:07:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:14,103 INFO L93 Difference]: Finished difference Result 3352 states and 4662 transitions. [2019-10-13 20:07:14,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:07:14,104 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 233 [2019-10-13 20:07:14,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:14,114 INFO L225 Difference]: With dead ends: 3352 [2019-10-13 20:07:14,114 INFO L226 Difference]: Without dead ends: 1882 [2019-10-13 20:07:14,118 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 464 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-10-13 20:07:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2019-10-13 20:07:14,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1676. [2019-10-13 20:07:14,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1676 states. [2019-10-13 20:07:14,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 2166 transitions. [2019-10-13 20:07:14,175 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 2166 transitions. Word has length 233 [2019-10-13 20:07:14,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:14,175 INFO L462 AbstractCegarLoop]: Abstraction has 1676 states and 2166 transitions. [2019-10-13 20:07:14,176 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:07:14,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 2166 transitions. [2019-10-13 20:07:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2019-10-13 20:07:14,182 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:14,182 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:07:14,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:14,388 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:14,388 INFO L82 PathProgramCache]: Analyzing trace with hash -266552290, now seen corresponding path program 1 times [2019-10-13 20:07:14,388 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:14,389 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155806823] [2019-10-13 20:07:14,389 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:14,389 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:14,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:15,123 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 206 proven. 142 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:15,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155806823] [2019-10-13 20:07:15,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115546248] [2019-10-13 20:07:15,124 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 20:07:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:15,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:07:15,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:15,325 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 258 proven. 53 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-13 20:07:15,627 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:15,699 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:07:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 128 proven. 220 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:07:16,234 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [617855010] [2019-10-13 20:07:16,239 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 318 [2019-10-13 20:07:16,290 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:07:16,290 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:07:29,081 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:07:29,083 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 484 root evaluator evaluations with a maximum evaluation depth of 13. Performed 484 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 20:07:29,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:29,087 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:07:32,992 INFO L227 lantSequenceWeakener]: Weakened 314 states. On average, predicates are now at 77.71% of their original sizes. [2019-10-13 20:07:32,993 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:07:33,085 INFO L553 sIntCurrentIteration]: We unified 316 AI predicates to 316 [2019-10-13 20:07:33,086 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:07:33,087 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:07:33,087 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 8, 8] total 29 [2019-10-13 20:07:33,088 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273377252] [2019-10-13 20:07:33,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 20:07:33,091 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:33,091 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:07:33,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 20:07:33,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:07:33,093 INFO L87 Difference]: Start difference. First operand 1676 states and 2166 transitions. Second operand 11 states.