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/Problem18_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:11:43,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:11:43,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:11:43,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:11:43,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:11:43,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:11:43,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:11:43,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:11:43,936 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:11:43,937 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:11:43,938 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:11:43,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:11:43,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:11:43,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:11:43,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:11:43,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:11:43,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:11:43,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:11:43,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:11:43,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:11:43,958 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:11:43,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:11:43,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:11:43,963 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:11:43,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:11:43,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:11:43,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:11:43,975 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:11:43,975 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:11:43,977 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:11:43,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:11:43,978 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:11:43,979 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:11:43,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:11:43,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:11:43,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:11:43,986 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 20:11:44,006 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:11:44,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:11:44,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:11:44,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:11:44,010 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:11:44,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:11:44,010 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:11:44,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:11:44,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:11:44,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:11:44,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:11:44,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:11:44,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:11:44,012 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:11:44,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:11:44,012 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:11:44,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:11:44,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:11:44,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:11:44,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:11:44,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:11:44,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:11:44,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:11:44,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:11:44,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:11:44,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:11:44,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:11:44,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:11:44,015 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 20:11:44,352 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:11:44,374 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:11:44,377 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:11:44,379 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:11:44,379 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:11:44,379 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label56.c [2019-10-13 20:11:44,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fce164fc/8050f16dd188474cbef150c516186bfd/FLAGba4ada926 [2019-10-13 20:11:45,199 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:11:45,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label56.c [2019-10-13 20:11:45,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fce164fc/8050f16dd188474cbef150c516186bfd/FLAGba4ada926 [2019-10-13 20:11:45,290 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fce164fc/8050f16dd188474cbef150c516186bfd [2019-10-13 20:11:45,300 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:11:45,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:11:45,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:45,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:11:45,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:11:45,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:45" (1/1) ... [2019-10-13 20:11:45,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67eb3e94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:45, skipping insertion in model container [2019-10-13 20:11:45,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:45" (1/1) ... [2019-10-13 20:11:45,321 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:11:45,450 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:11:46,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:46,564 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:11:47,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:47,193 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:11:47,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47 WrapperNode [2019-10-13 20:11:47,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:47,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:11:47,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:11:47,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:11:47,211 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,212 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,364 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,384 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (1/1) ... [2019-10-13 20:11:47,414 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:11:47,415 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:11:47,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:11:47,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:11:47,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (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 20:11:47,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:11:47,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:11:47,494 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:11:47,495 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:11:47,495 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:11:47,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:11:47,495 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:11:47,495 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:11:47,496 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:11:47,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:11:47,496 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:11:47,496 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:11:47,497 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:11:47,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:11:47,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:11:51,670 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:11:51,675 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:11:51,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:51 BoogieIcfgContainer [2019-10-13 20:11:51,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:11:51,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:11:51,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:11:51,684 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:11:51,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:11:45" (1/3) ... [2019-10-13 20:11:51,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddbdaa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:51, skipping insertion in model container [2019-10-13 20:11:51,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:47" (2/3) ... [2019-10-13 20:11:51,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddbdaa8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:51, skipping insertion in model container [2019-10-13 20:11:51,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:51" (3/3) ... [2019-10-13 20:11:51,688 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label56.c [2019-10-13 20:11:51,700 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:11:51,709 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:11:51,721 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:11:51,754 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:11:51,755 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:11:51,755 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:11:51,755 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:11:51,755 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:11:51,755 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:11:51,756 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:11:51,756 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:11:51,792 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:11:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 20:11:51,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:51,802 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] [2019-10-13 20:11:51,804 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:51,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:51,810 INFO L82 PathProgramCache]: Analyzing trace with hash -447969511, now seen corresponding path program 1 times [2019-10-13 20:11:51,818 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:51,818 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074208666] [2019-10-13 20:11:51,818 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:51,819 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:51,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:52,134 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 20:11:52,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074208666] [2019-10-13 20:11:52,136 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:52,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:11:52,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168048469] [2019-10-13 20:11:52,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:11:52,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:52,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:11:52,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:11:52,165 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 4 states. [2019-10-13 20:11:59,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:59,638 INFO L93 Difference]: Finished difference Result 2970 states and 5743 transitions. [2019-10-13 20:11:59,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:11:59,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2019-10-13 20:11:59,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:59,676 INFO L225 Difference]: With dead ends: 2970 [2019-10-13 20:11:59,676 INFO L226 Difference]: Without dead ends: 2114 [2019-10-13 20:11:59,687 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:11:59,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-10-13 20:11:59,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 2114. [2019-10-13 20:11:59,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2114 states. [2019-10-13 20:11:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 3476 transitions. [2019-10-13 20:11:59,848 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 3476 transitions. Word has length 54 [2019-10-13 20:11:59,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:59,848 INFO L462 AbstractCegarLoop]: Abstraction has 2114 states and 3476 transitions. [2019-10-13 20:11:59,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:11:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 3476 transitions. [2019-10-13 20:11:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-13 20:11:59,855 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:59,855 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:11:59,855 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:59,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:59,856 INFO L82 PathProgramCache]: Analyzing trace with hash -970247243, now seen corresponding path program 1 times [2019-10-13 20:11:59,856 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:59,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950703325] [2019-10-13 20:11:59,857 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:59,857 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:59,857 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:12:00,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950703325] [2019-10-13 20:12:00,094 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:12:00,095 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:12:00,095 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650939059] [2019-10-13 20:12:00,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:12:00,103 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:12:00,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:12:00,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:12:00,104 INFO L87 Difference]: Start difference. First operand 2114 states and 3476 transitions. Second operand 5 states. [2019-10-13 20:12:05,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:05,698 INFO L93 Difference]: Finished difference Result 6436 states and 10709 transitions. [2019-10-13 20:12:05,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:12:05,702 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 123 [2019-10-13 20:12:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:05,735 INFO L225 Difference]: With dead ends: 6436 [2019-10-13 20:12:05,735 INFO L226 Difference]: Without dead ends: 4328 [2019-10-13 20:12:05,742 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 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 20:12:05,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2019-10-13 20:12:05,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 4296. [2019-10-13 20:12:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4296 states. [2019-10-13 20:12:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4296 states to 4296 states and 6660 transitions. [2019-10-13 20:12:05,880 INFO L78 Accepts]: Start accepts. Automaton has 4296 states and 6660 transitions. Word has length 123 [2019-10-13 20:12:05,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:12:05,882 INFO L462 AbstractCegarLoop]: Abstraction has 4296 states and 6660 transitions. [2019-10-13 20:12:05,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:12:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4296 states and 6660 transitions. [2019-10-13 20:12:05,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 20:12:05,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:12:05,895 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:12:05,895 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:12:05,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:12:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1136099392, now seen corresponding path program 1 times [2019-10-13 20:12:05,897 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:12:05,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435112224] [2019-10-13 20:12:05,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:05,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:05,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:12:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:12:06,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435112224] [2019-10-13 20:12:06,139 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:12:06,139 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:12:06,139 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787317529] [2019-10-13 20:12:06,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:12:06,140 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:12:06,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:12:06,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:12:06,141 INFO L87 Difference]: Start difference. First operand 4296 states and 6660 transitions. Second operand 6 states. [2019-10-13 20:12:10,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:10,978 INFO L93 Difference]: Finished difference Result 10829 states and 16791 transitions. [2019-10-13 20:12:10,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:12:10,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-10-13 20:12:10,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:11,014 INFO L225 Difference]: With dead ends: 10829 [2019-10-13 20:12:11,015 INFO L226 Difference]: Without dead ends: 6539 [2019-10-13 20:12:11,027 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 20:12:11,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6539 states. [2019-10-13 20:12:11,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6539 to 6505. [2019-10-13 20:12:11,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6505 states. [2019-10-13 20:12:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 8565 transitions. [2019-10-13 20:12:11,260 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 8565 transitions. Word has length 150 [2019-10-13 20:12:11,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:12:11,261 INFO L462 AbstractCegarLoop]: Abstraction has 6505 states and 8565 transitions. [2019-10-13 20:12:11,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:12:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 8565 transitions. [2019-10-13 20:12:11,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2019-10-13 20:12:11,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:12:11,266 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:12:11,266 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:12:11,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:12:11,267 INFO L82 PathProgramCache]: Analyzing trace with hash 874519778, now seen corresponding path program 1 times [2019-10-13 20:12:11,267 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:12:11,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165197369] [2019-10-13 20:12:11,268 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:11,268 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:11,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:12:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-13 20:12:11,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165197369] [2019-10-13 20:12:11,503 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:12:11,503 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:12:11,503 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857366575] [2019-10-13 20:12:11,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:12:11,504 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:12:11,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:12:11,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:12:11,505 INFO L87 Difference]: Start difference. First operand 6505 states and 8565 transitions. Second operand 4 states. [2019-10-13 20:12:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:17,937 INFO L93 Difference]: Finished difference Result 25846 states and 35185 transitions. [2019-10-13 20:12:17,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:12:17,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 229 [2019-10-13 20:12:17,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:18,030 INFO L225 Difference]: With dead ends: 25846 [2019-10-13 20:12:18,031 INFO L226 Difference]: Without dead ends: 19347 [2019-10-13 20:12:18,054 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:12:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19347 states. [2019-10-13 20:12:18,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19347 to 19347. [2019-10-13 20:12:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19347 states. [2019-10-13 20:12:18,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19347 states to 19347 states and 25089 transitions. [2019-10-13 20:12:18,631 INFO L78 Accepts]: Start accepts. Automaton has 19347 states and 25089 transitions. Word has length 229 [2019-10-13 20:12:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:12:18,634 INFO L462 AbstractCegarLoop]: Abstraction has 19347 states and 25089 transitions. [2019-10-13 20:12:18,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:12:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 19347 states and 25089 transitions. [2019-10-13 20:12:18,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-10-13 20:12:18,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:12:18,642 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:12:18,642 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:12:18,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:12:18,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1804576933, now seen corresponding path program 1 times [2019-10-13 20:12:18,643 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:12:18,643 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382456073] [2019-10-13 20:12:18,644 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:18,644 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:18,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:12:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:12:18,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382456073] [2019-10-13 20:12:18,885 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215293913] [2019-10-13 20:12:18,886 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 20:12:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:19,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:12:19,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:12:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:12:19,260 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:12:19,448 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:12:19,448 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1296961642] [2019-10-13 20:12:19,456 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 237 [2019-10-13 20:12:19,523 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:12:19,523 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)