java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:54:59,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:54:59,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:54:59,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:54:59,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:54:59,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:54:59,967 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:54:59,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:54:59,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:54:59,971 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:54:59,972 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:54:59,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:54:59,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:54:59,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:54:59,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:54:59,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:54:59,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:54:59,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:54:59,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:54:59,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:54:59,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:54:59,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:54:59,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:54:59,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:54:59,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:54:59,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:54:59,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:54:59,992 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:54:59,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:54:59,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:54:59,994 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:54:59,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:54:59,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:54:59,995 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:54:59,996 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:54:59,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:54:59,998 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:55:00,012 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:55:00,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:55:00,016 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:55:00,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:55:00,016 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:55:00,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:55:00,017 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:55:00,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:55:00,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:55:00,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:55:00,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:55:00,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:55:00,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:55:00,019 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:55:00,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:55:00,020 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:55:00,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:55:00,020 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:55:00,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:55:00,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:55:00,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:55:00,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:55:00,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:55:00,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:55:00,022 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:55:00,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:55:00,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:55:00,023 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:55:00,023 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:55:00,288 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:55:00,304 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:55:00,307 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:55:00,308 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:55:00,309 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:55:00,310 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label53.c [2019-10-14 23:55:00,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c72e1fef1/e4abf7508880410a9d0e621e2b6a7df3/FLAGdd4418813 [2019-10-14 23:55:00,918 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:55:00,921 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label53.c [2019-10-14 23:55:00,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c72e1fef1/e4abf7508880410a9d0e621e2b6a7df3/FLAGdd4418813 [2019-10-14 23:55:01,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c72e1fef1/e4abf7508880410a9d0e621e2b6a7df3 [2019-10-14 23:55:01,174 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:55:01,175 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:55:01,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:01,177 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:55:01,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:55:01,181 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:01" (1/1) ... [2019-10-14 23:55:01,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df4475c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:01, skipping insertion in model container [2019-10-14 23:55:01,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:55:01" (1/1) ... [2019-10-14 23:55:01,189 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:55:01,240 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:55:01,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:01,859 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:55:01,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:55:01,965 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:55:01,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:01 WrapperNode [2019-10-14 23:55:01,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:55:01,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:55:01,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:55:01,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:55:01,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:01" (1/1) ... [2019-10-14 23:55:01,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:01" (1/1) ... [2019-10-14 23:55:01,994 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:01" (1/1) ... [2019-10-14 23:55:01,995 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:01" (1/1) ... [2019-10-14 23:55:02,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:01" (1/1) ... [2019-10-14 23:55:02,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:01" (1/1) ... [2019-10-14 23:55:02,058 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:01" (1/1) ... [2019-10-14 23:55:02,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:55:02,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:55:02,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:55:02,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:55:02,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:55:02,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:55:02,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:55:02,161 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:55:02,162 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:55:02,162 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:55:02,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:55:02,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:55:02,163 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:55:02,163 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:55:02,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:55:02,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:55:03,353 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:55:03,354 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:55:03,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:03 BoogieIcfgContainer [2019-10-14 23:55:03,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:55:03,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:55:03,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:55:03,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:55:03,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:55:01" (1/3) ... [2019-10-14 23:55:03,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60aa5fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:03, skipping insertion in model container [2019-10-14 23:55:03,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:55:01" (2/3) ... [2019-10-14 23:55:03,362 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60aa5fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:55:03, skipping insertion in model container [2019-10-14 23:55:03,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:55:03" (3/3) ... [2019-10-14 23:55:03,364 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label53.c [2019-10-14 23:55:03,374 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:55:03,382 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:55:03,394 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:55:03,422 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:55:03,422 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:55:03,422 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:55:03,422 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:55:03,424 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:55:03,424 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:55:03,425 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:55:03,425 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:55:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:55:03,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 23:55:03,479 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:03,480 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:03,482 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:03,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:03,488 INFO L82 PathProgramCache]: Analyzing trace with hash 597031182, now seen corresponding path program 1 times [2019-10-14 23:55:03,497 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:03,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433986501] [2019-10-14 23:55:03,498 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:03,498 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:03,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:03,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:03,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433986501] [2019-10-14 23:55:03,975 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:03,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:55:03,976 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300554628] [2019-10-14 23:55:03,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:03,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:03,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:03,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:04,000 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:55:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:04,861 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:55:04,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:04,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2019-10-14 23:55:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:04,894 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:55:04,894 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:55:04,906 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:04,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:55:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:55:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:55:05,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-10-14 23:55:05,022 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 120 [2019-10-14 23:55:05,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:05,023 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-10-14 23:55:05,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:05,023 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-10-14 23:55:05,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-14 23:55:05,027 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:05,028 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:55:05,028 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:05,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 330455461, now seen corresponding path program 1 times [2019-10-14 23:55:05,029 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:05,029 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096889490] [2019-10-14 23:55:05,029 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:05,029 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:05,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:05,156 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:05,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096889490] [2019-10-14 23:55:05,157 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:05,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:55:05,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482235714] [2019-10-14 23:55:05,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:55:05,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:05,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:55:05,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:55:05,160 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-10-14 23:55:05,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:05,917 INFO L93 Difference]: Finished difference Result 703 states and 1026 transitions. [2019-10-14 23:55:05,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:55:05,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 130 [2019-10-14 23:55:05,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:05,923 INFO L225 Difference]: With dead ends: 703 [2019-10-14 23:55:05,924 INFO L226 Difference]: Without dead ends: 431 [2019-10-14 23:55:05,925 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:55:05,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-10-14 23:55:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-10-14 23:55:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-10-14 23:55:05,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-10-14 23:55:05,956 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 130 [2019-10-14 23:55:05,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:05,957 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-10-14 23:55:05,957 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:55:05,957 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-10-14 23:55:05,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-14 23:55:05,960 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:05,961 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:55:05,961 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:05,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:05,961 INFO L82 PathProgramCache]: Analyzing trace with hash -46995225, now seen corresponding path program 1 times [2019-10-14 23:55:05,962 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:05,962 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772151885] [2019-10-14 23:55:05,962 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:05,962 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:05,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:06,298 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772151885] [2019-10-14 23:55:06,298 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:06,298 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:55:06,298 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652413159] [2019-10-14 23:55:06,299 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:55:06,299 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:06,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:55:06,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:06,300 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 5 states. [2019-10-14 23:55:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:07,004 INFO L93 Difference]: Finished difference Result 933 states and 1337 transitions. [2019-10-14 23:55:07,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:55:07,006 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-10-14 23:55:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:07,009 INFO L225 Difference]: With dead ends: 933 [2019-10-14 23:55:07,009 INFO L226 Difference]: Without dead ends: 417 [2019-10-14 23:55:07,011 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:07,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2019-10-14 23:55:07,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2019-10-14 23:55:07,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-10-14 23:55:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 550 transitions. [2019-10-14 23:55:07,031 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 550 transitions. Word has length 131 [2019-10-14 23:55:07,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:07,032 INFO L462 AbstractCegarLoop]: Abstraction has 417 states and 550 transitions. [2019-10-14 23:55:07,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:55:07,032 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 550 transitions. [2019-10-14 23:55:07,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 23:55:07,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:07,035 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:55:07,035 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:07,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:07,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1746951265, now seen corresponding path program 1 times [2019-10-14 23:55:07,036 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:07,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679921852] [2019-10-14 23:55:07,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:07,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:07,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:07,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679921852] [2019-10-14 23:55:07,376 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:07,376 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:55:07,376 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392214966] [2019-10-14 23:55:07,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:55:07,377 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:07,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:55:07,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:07,378 INFO L87 Difference]: Start difference. First operand 417 states and 550 transitions. Second operand 5 states. [2019-10-14 23:55:07,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:07,903 INFO L93 Difference]: Finished difference Result 912 states and 1228 transitions. [2019-10-14 23:55:07,904 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:55:07,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-10-14 23:55:07,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:07,907 INFO L225 Difference]: With dead ends: 912 [2019-10-14 23:55:07,907 INFO L226 Difference]: Without dead ends: 417 [2019-10-14 23:55:07,909 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:07,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2019-10-14 23:55:07,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 417. [2019-10-14 23:55:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-10-14 23:55:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 547 transitions. [2019-10-14 23:55:07,924 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 547 transitions. Word has length 132 [2019-10-14 23:55:07,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:07,925 INFO L462 AbstractCegarLoop]: Abstraction has 417 states and 547 transitions. [2019-10-14 23:55:07,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:55:07,925 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 547 transitions. [2019-10-14 23:55:07,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-14 23:55:07,927 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:07,927 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:07,928 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:07,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1219225115, now seen corresponding path program 1 times [2019-10-14 23:55:07,928 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:07,928 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848976015] [2019-10-14 23:55:07,929 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:07,929 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:07,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:08,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848976015] [2019-10-14 23:55:08,124 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:08,124 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:55:08,124 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584808816] [2019-10-14 23:55:08,125 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:08,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:08,126 INFO L87 Difference]: Start difference. First operand 417 states and 547 transitions. Second operand 3 states. [2019-10-14 23:55:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:08,542 INFO L93 Difference]: Finished difference Result 1237 states and 1661 transitions. [2019-10-14 23:55:08,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:08,543 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2019-10-14 23:55:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:08,548 INFO L225 Difference]: With dead ends: 1237 [2019-10-14 23:55:08,548 INFO L226 Difference]: Without dead ends: 826 [2019-10-14 23:55:08,550 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:55:08,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2019-10-14 23:55:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 826. [2019-10-14 23:55:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2019-10-14 23:55:08,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1069 transitions. [2019-10-14 23:55:08,583 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1069 transitions. Word has length 137 [2019-10-14 23:55:08,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:08,584 INFO L462 AbstractCegarLoop]: Abstraction has 826 states and 1069 transitions. [2019-10-14 23:55:08,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:08,584 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1069 transitions. [2019-10-14 23:55:08,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-14 23:55:08,589 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:08,589 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:08,590 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:08,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:08,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1710204053, now seen corresponding path program 1 times [2019-10-14 23:55:08,590 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:08,591 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571956357] [2019-10-14 23:55:08,591 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:08,591 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:08,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:08,662 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571956357] [2019-10-14 23:55:08,662 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:55:08,663 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:55:08,663 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815971943] [2019-10-14 23:55:08,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:55:08,664 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:08,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:55:08,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:55:08,664 INFO L87 Difference]: Start difference. First operand 826 states and 1069 transitions. Second operand 6 states. [2019-10-14 23:55:09,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:09,337 INFO L93 Difference]: Finished difference Result 2375 states and 3230 transitions. [2019-10-14 23:55:09,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:55:09,337 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-10-14 23:55:09,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:09,348 INFO L225 Difference]: With dead ends: 2375 [2019-10-14 23:55:09,348 INFO L226 Difference]: Without dead ends: 1555 [2019-10-14 23:55:09,351 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:55:09,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2019-10-14 23:55:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1531. [2019-10-14 23:55:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1531 states. [2019-10-14 23:55:09,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 1928 transitions. [2019-10-14 23:55:09,418 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 1928 transitions. Word has length 138 [2019-10-14 23:55:09,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:09,418 INFO L462 AbstractCegarLoop]: Abstraction has 1531 states and 1928 transitions. [2019-10-14 23:55:09,419 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:55:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 1928 transitions. [2019-10-14 23:55:09,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-14 23:55:09,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:09,425 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:55:09,426 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:09,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:09,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2034569339, now seen corresponding path program 1 times [2019-10-14 23:55:09,426 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:09,427 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809686249] [2019-10-14 23:55:09,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:09,427 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:09,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 23:55:09,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809686249] [2019-10-14 23:55:09,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248811648] [2019-10-14 23:55:09,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:55:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:09,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:55:09,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:55:09,776 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:09,776 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:55:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:09,867 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:55:09,868 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-14 23:55:09,869 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53685218] [2019-10-14 23:55:09,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:55:09,871 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:55:09,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:55:09,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:09,871 INFO L87 Difference]: Start difference. First operand 1531 states and 1928 transitions. Second operand 3 states. [2019-10-14 23:55:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:55:10,424 INFO L93 Difference]: Finished difference Result 3872 states and 4890 transitions. [2019-10-14 23:55:10,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:55:10,425 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2019-10-14 23:55:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:55:10,439 INFO L225 Difference]: With dead ends: 3872 [2019-10-14 23:55:10,439 INFO L226 Difference]: Without dead ends: 2347 [2019-10-14 23:55:10,444 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 293 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:55:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2019-10-14 23:55:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 1803. [2019-10-14 23:55:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1803 states. [2019-10-14 23:55:10,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1803 states to 1803 states and 2259 transitions. [2019-10-14 23:55:10,520 INFO L78 Accepts]: Start accepts. Automaton has 1803 states and 2259 transitions. Word has length 146 [2019-10-14 23:55:10,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:55:10,521 INFO L462 AbstractCegarLoop]: Abstraction has 1803 states and 2259 transitions. [2019-10-14 23:55:10,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:55:10,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1803 states and 2259 transitions. [2019-10-14 23:55:10,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-14 23:55:10,527 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:55:10,527 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:55:10,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:55:10,733 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:55:10,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:55:10,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1422723674, now seen corresponding path program 1 times [2019-10-14 23:55:10,734 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:55:10,734 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788488171] [2019-10-14 23:55:10,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:10,735 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:55:10,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:55:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:55:10,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788488171] [2019-10-14 23:55:10,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139377018] [2019-10-14 23:55:10,839 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 [2019-10-14 23:55:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:55:10,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:55:10,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:55:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:55:11,000 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:55:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:55:11,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [255672624] [2019-10-14 23:55:11,146 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 154 [2019-10-14 23:55:11,197 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:55:11,198 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)