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_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:44,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:44,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:44,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:07:44,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:07:44,885 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:07:44,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:07:44,889 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:07:44,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:07:44,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:07:44,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:07:44,902 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:07:44,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:44,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:44,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:44,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:44,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:44,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:44,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:44,917 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:44,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:44,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:44,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:44,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:44,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:07:44,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:07:44,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:07:44,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:07:44,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:07:44,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:07:44,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:07:44,934 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:07:44,935 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:07:44,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:07:44,939 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:07:44,940 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:07:44,940 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:07:44,940 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:07:44,941 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:44,941 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:44,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:44,945 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 20:07:44,978 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:44,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:44,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:44,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:44,980 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:44,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:44,980 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:44,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:44,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:44,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:44,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:44,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:44,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:44,981 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:44,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:44,982 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:44,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:44,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:44,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:44,983 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:44,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:44,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:44,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:44,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:44,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:44,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:44,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:44,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:44,984 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 20:07:45,253 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:45,265 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:45,268 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:45,270 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:45,270 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:45,271 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label51.c [2019-10-13 20:07:45,344 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3efb926/45cea69a4c8c4f6a846a4f9653fe7774/FLAGbe31742a5 [2019-10-13 20:07:45,896 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:45,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label51.c [2019-10-13 20:07:45,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3efb926/45cea69a4c8c4f6a846a4f9653fe7774/FLAGbe31742a5 [2019-10-13 20:07:46,216 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a3efb926/45cea69a4c8c4f6a846a4f9653fe7774 [2019-10-13 20:07:46,226 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:46,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:46,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:46,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:46,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:46,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:46" (1/1) ... [2019-10-13 20:07:46,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@404140b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:46, skipping insertion in model container [2019-10-13 20:07:46,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:46" (1/1) ... [2019-10-13 20:07:46,243 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:46,295 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:46,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:46,891 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:47,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:47,205 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:47,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:47 WrapperNode [2019-10-13 20:07:47,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:47,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:47,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:47,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:47,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:47" (1/1) ... [2019-10-13 20:07:47,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:47" (1/1) ... [2019-10-13 20:07:47,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:47" (1/1) ... [2019-10-13 20:07:47,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:47" (1/1) ... [2019-10-13 20:07:47,296 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:47" (1/1) ... [2019-10-13 20:07:47,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:47" (1/1) ... [2019-10-13 20:07:47,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:47" (1/1) ... [2019-10-13 20:07:47,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:47,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:47,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:47,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:47,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:47" (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 20:07:47,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:47,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:47,438 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:47,438 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:47,438 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:47,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:47,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:47,439 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:47,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:47,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:47,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:48,999 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:49,000 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:49,004 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:49 BoogieIcfgContainer [2019-10-13 20:07:49,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:49,006 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:49,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:49,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:49,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:46" (1/3) ... [2019-10-13 20:07:49,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbd08d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:49, skipping insertion in model container [2019-10-13 20:07:49,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:47" (2/3) ... [2019-10-13 20:07:49,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dbd08d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:49, skipping insertion in model container [2019-10-13 20:07:49,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:49" (3/3) ... [2019-10-13 20:07:49,022 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label51.c [2019-10-13 20:07:49,032 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:49,041 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:49,052 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:49,087 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:49,087 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:49,089 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:49,089 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:49,089 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:49,089 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:49,089 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:49,090 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:49,120 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:49,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 20:07:49,129 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:49,131 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] [2019-10-13 20:07:49,132 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:49,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1352567654, now seen corresponding path program 1 times [2019-10-13 20:07:49,149 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:49,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134042808] [2019-10-13 20:07:49,149 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:49,149 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:49,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:49,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:49,395 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 20:07:49,395 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134042808] [2019-10-13 20:07:49,396 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:49,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:07:49,397 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189678953] [2019-10-13 20:07:49,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:07:49,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:49,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:07:49,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:49,420 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-13 20:07:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:50,750 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-13 20:07:50,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:07:50,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2019-10-13 20:07:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:50,771 INFO L225 Difference]: With dead ends: 688 [2019-10-13 20:07:50,771 INFO L226 Difference]: Without dead ends: 372 [2019-10-13 20:07:50,784 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 20:07:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-13 20:07:50,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-13 20:07:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:07:50,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 596 transitions. [2019-10-13 20:07:50,861 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 596 transitions. Word has length 41 [2019-10-13 20:07:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:50,861 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 596 transitions. [2019-10-13 20:07:50,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:07:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 596 transitions. [2019-10-13 20:07:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-10-13 20:07:50,867 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:50,867 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:07:50,868 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:50,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1876604734, now seen corresponding path program 1 times [2019-10-13 20:07:50,868 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:50,869 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240463135] [2019-10-13 20:07:50,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:50,869 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:50,869 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:50,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:51,083 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240463135] [2019-10-13 20:07:51,083 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:51,083 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:07:51,083 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265006785] [2019-10-13 20:07:51,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:07:51,086 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:51,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:07:51,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:07:51,087 INFO L87 Difference]: Start difference. First operand 372 states and 596 transitions. Second operand 5 states. [2019-10-13 20:07:52,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:52,392 INFO L93 Difference]: Finished difference Result 940 states and 1514 transitions. [2019-10-13 20:07:52,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:07:52,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 117 [2019-10-13 20:07:52,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:52,399 INFO L225 Difference]: With dead ends: 940 [2019-10-13 20:07:52,399 INFO L226 Difference]: Without dead ends: 574 [2019-10-13 20:07:52,401 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:07:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2019-10-13 20:07:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 564. [2019-10-13 20:07:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2019-10-13 20:07:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 831 transitions. [2019-10-13 20:07:52,442 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 831 transitions. Word has length 117 [2019-10-13 20:07:52,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:52,442 INFO L462 AbstractCegarLoop]: Abstraction has 564 states and 831 transitions. [2019-10-13 20:07:52,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:07:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 831 transitions. [2019-10-13 20:07:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-13 20:07:52,456 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:52,457 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:07:52,457 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:52,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:52,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1520330050, now seen corresponding path program 1 times [2019-10-13 20:07:52,461 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:52,461 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549664023] [2019-10-13 20:07:52,461 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:52,462 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:52,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:52,790 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:52,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549664023] [2019-10-13 20:07:52,791 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:52,791 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:07:52,791 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786559188] [2019-10-13 20:07:52,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:07:52,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:52,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:07:52,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:07:52,793 INFO L87 Difference]: Start difference. First operand 564 states and 831 transitions. Second operand 6 states. [2019-10-13 20:07:54,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:54,030 INFO L93 Difference]: Finished difference Result 1526 states and 2378 transitions. [2019-10-13 20:07:54,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:07:54,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 181 [2019-10-13 20:07:54,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:54,039 INFO L225 Difference]: With dead ends: 1526 [2019-10-13 20:07:54,039 INFO L226 Difference]: Without dead ends: 968 [2019-10-13 20:07:54,041 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 20:07:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2019-10-13 20:07:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 942. [2019-10-13 20:07:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 942 states. [2019-10-13 20:07:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1352 transitions. [2019-10-13 20:07:54,096 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1352 transitions. Word has length 181 [2019-10-13 20:07:54,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:54,097 INFO L462 AbstractCegarLoop]: Abstraction has 942 states and 1352 transitions. [2019-10-13 20:07:54,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:07:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1352 transitions. [2019-10-13 20:07:54,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-13 20:07:54,105 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:54,105 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:54,105 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:54,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:54,106 INFO L82 PathProgramCache]: Analyzing trace with hash -906348779, now seen corresponding path program 1 times [2019-10-13 20:07:54,106 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:54,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901604423] [2019-10-13 20:07:54,107 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:54,107 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:54,107 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:54,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901604423] [2019-10-13 20:07:54,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660956544] [2019-10-13 20:07:54,290 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 20:07:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:54,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:07:54,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:07:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:54,515 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:07:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:54,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1145210964] [2019-10-13 20:07:54,697 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 201 [2019-10-13 20:07:54,742 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:07:54,742 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:07:58,984 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:07:58,987 INFO L272 AbstractInterpreter]: Visited 88 different actions 88 times. Never merged. Never widened. Performed 215 root evaluator evaluations with a maximum evaluation depth of 13. Performed 215 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-13 20:07:58,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:58,992 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:08:02,133 INFO L227 lantSequenceWeakener]: Weakened 181 states. On average, predicates are now at 78.01% of their original sizes. [2019-10-13 20:08:02,134 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:08:02,196 INFO L553 sIntCurrentIteration]: We unified 199 AI predicates to 199 [2019-10-13 20:08:02,196 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:08:02,197 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:08:02,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 5, 5] total 18 [2019-10-13 20:08:02,198 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986720456] [2019-10-13 20:08:02,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 20:08:02,199 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:02,200 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:08:02,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 20:08:02,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:08:02,200 INFO L87 Difference]: Start difference. First operand 942 states and 1352 transitions. Second operand 10 states.