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/Problem02_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:56:39,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:56:39,693 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:56:39,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:56:39,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:56:39,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:56:39,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:56:39,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:56:39,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:56:39,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:56:39,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:56:39,738 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:56:39,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:56:39,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:56:39,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:56:39,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:56:39,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:56:39,746 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:56:39,747 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:56:39,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:56:39,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:56:39,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:56:39,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:56:39,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:56:39,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:56:39,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:56:39,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:56:39,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:56:39,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:56:39,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:56:39,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:56:39,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:56:39,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:56:39,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:56:39,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:56:39,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:56:39,776 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 23:56:39,812 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:56:39,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:56:39,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:56:39,814 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:56:39,814 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:56:39,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:56:39,814 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:56:39,814 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:56:39,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:56:39,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:56:39,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:56:39,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:56:39,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:56:39,816 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:56:39,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:56:39,816 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:56:39,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:56:39,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:56:39,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:56:39,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:56:39,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:56:39,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:56:39,820 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:56:39,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:56:39,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:56:39,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:56:39,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:56:39,821 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:56:39,821 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 23:56:40,140 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:56:40,162 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:56:40,165 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:56:40,167 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:56:40,167 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:56:40,168 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label29.c [2019-10-14 23:56:40,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723c42247/95222e715cbc483d898a5d99528da9db/FLAG86adecc36 [2019-10-14 23:56:40,844 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:56:40,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label29.c [2019-10-14 23:56:40,874 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723c42247/95222e715cbc483d898a5d99528da9db/FLAG86adecc36 [2019-10-14 23:56:41,108 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/723c42247/95222e715cbc483d898a5d99528da9db [2019-10-14 23:56:41,117 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:56:41,119 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:56:41,120 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:41,120 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:56:41,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:56:41,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:41,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbd8e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41, skipping insertion in model container [2019-10-14 23:56:41,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:41,134 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:56:41,193 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:56:41,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:41,684 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:56:41,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:41,891 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:56:41,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41 WrapperNode [2019-10-14 23:56:41,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:41,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:56:41,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:56:41,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:56:41,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:41,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:41,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:41,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:41,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:42,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:42,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (1/1) ... [2019-10-14 23:56:42,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:56:42,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:56:42,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:56:42,023 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:56:42,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (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 23:56:42,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:56:42,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:56:42,102 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:56:42,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:56:42,103 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:56:42,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:56:42,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:56:42,105 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:56:42,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:56:42,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:56:42,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:56:43,440 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:56:43,440 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:56:43,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:43 BoogieIcfgContainer [2019-10-14 23:56:43,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:56:43,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:56:43,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:56:43,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:56:43,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:56:41" (1/3) ... [2019-10-14 23:56:43,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dcc4e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:43, skipping insertion in model container [2019-10-14 23:56:43,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:41" (2/3) ... [2019-10-14 23:56:43,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dcc4e42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:43, skipping insertion in model container [2019-10-14 23:56:43,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:43" (3/3) ... [2019-10-14 23:56:43,451 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label29.c [2019-10-14 23:56:43,462 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:56:43,471 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:56:43,483 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:56:43,513 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:56:43,513 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:56:43,513 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:56:43,514 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:56:43,514 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:56:43,514 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:56:43,514 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:56:43,514 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:56:43,540 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:56:43,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-14 23:56:43,553 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:43,554 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] [2019-10-14 23:56:43,556 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:43,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:43,563 INFO L82 PathProgramCache]: Analyzing trace with hash 370140070, now seen corresponding path program 1 times [2019-10-14 23:56:43,572 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:43,573 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541741715] [2019-10-14 23:56:43,573 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:43,573 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:43,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:44,119 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 23:56:44,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541741715] [2019-10-14 23:56:44,122 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:44,122 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:44,123 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003968165] [2019-10-14 23:56:44,131 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:44,133 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:44,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:44,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:44,157 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:56:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:45,136 INFO L93 Difference]: Finished difference Result 624 states and 1069 transitions. [2019-10-14 23:56:45,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:45,140 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2019-10-14 23:56:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:45,171 INFO L225 Difference]: With dead ends: 624 [2019-10-14 23:56:45,171 INFO L226 Difference]: Without dead ends: 326 [2019-10-14 23:56:45,179 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 23:56:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-10-14 23:56:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 321. [2019-10-14 23:56:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-10-14 23:56:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 467 transitions. [2019-10-14 23:56:45,258 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 467 transitions. Word has length 108 [2019-10-14 23:56:45,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:45,259 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 467 transitions. [2019-10-14 23:56:45,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:45,260 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 467 transitions. [2019-10-14 23:56:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-14 23:56:45,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:45,266 INFO L380 BasicCegarLoop]: trace histogram [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 23:56:45,267 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:45,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:45,267 INFO L82 PathProgramCache]: Analyzing trace with hash 330075201, now seen corresponding path program 1 times [2019-10-14 23:56:45,268 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:45,268 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508581221] [2019-10-14 23:56:45,268 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:45,268 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:45,269 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:45,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:45,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508581221] [2019-10-14 23:56:45,412 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:45,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:45,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245081567] [2019-10-14 23:56:45,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:45,415 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:45,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:45,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:45,415 INFO L87 Difference]: Start difference. First operand 321 states and 467 transitions. Second operand 3 states. [2019-10-14 23:56:45,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:45,992 INFO L93 Difference]: Finished difference Result 927 states and 1371 transitions. [2019-10-14 23:56:45,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:45,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2019-10-14 23:56:45,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:46,001 INFO L225 Difference]: With dead ends: 927 [2019-10-14 23:56:46,002 INFO L226 Difference]: Without dead ends: 612 [2019-10-14 23:56:46,004 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 23:56:46,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2019-10-14 23:56:46,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 612. [2019-10-14 23:56:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 612 states. [2019-10-14 23:56:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 797 transitions. [2019-10-14 23:56:46,047 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 797 transitions. Word has length 116 [2019-10-14 23:56:46,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:46,048 INFO L462 AbstractCegarLoop]: Abstraction has 612 states and 797 transitions. [2019-10-14 23:56:46,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 797 transitions. [2019-10-14 23:56:46,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 23:56:46,054 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:46,054 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:56:46,054 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:46,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:46,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1438415473, now seen corresponding path program 1 times [2019-10-14 23:56:46,055 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:46,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511626201] [2019-10-14 23:56:46,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:46,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:46,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:46,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:46,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511626201] [2019-10-14 23:56:46,274 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:46,274 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:46,274 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26871305] [2019-10-14 23:56:46,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:46,277 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:46,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:46,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:46,277 INFO L87 Difference]: Start difference. First operand 612 states and 797 transitions. Second operand 3 states. [2019-10-14 23:56:46,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:46,889 INFO L93 Difference]: Finished difference Result 1794 states and 2385 transitions. [2019-10-14 23:56:46,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:46,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-14 23:56:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:46,898 INFO L225 Difference]: With dead ends: 1794 [2019-10-14 23:56:46,899 INFO L226 Difference]: Without dead ends: 1188 [2019-10-14 23:56:46,901 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 23:56:46,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2019-10-14 23:56:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1044. [2019-10-14 23:56:46,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1044 states. [2019-10-14 23:56:46,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1361 transitions. [2019-10-14 23:56:46,979 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1361 transitions. Word has length 121 [2019-10-14 23:56:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:46,981 INFO L462 AbstractCegarLoop]: Abstraction has 1044 states and 1361 transitions. [2019-10-14 23:56:46,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1361 transitions. [2019-10-14 23:56:46,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-14 23:56:46,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:46,992 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:56:46,992 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:46,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:46,992 INFO L82 PathProgramCache]: Analyzing trace with hash 535579249, now seen corresponding path program 1 times [2019-10-14 23:56:46,993 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:46,993 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295915150] [2019-10-14 23:56:46,993 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:46,993 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:46,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:56:47,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295915150] [2019-10-14 23:56:47,145 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216690402] [2019-10-14 23:56:47,145 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 23:56:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:47,269 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-14 23:56:47,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:56:47,370 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 23:56:47,457 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:56:47,457 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 8 [2019-10-14 23:56:47,457 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845227925] [2019-10-14 23:56:47,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:56:47,459 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:47,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:56:47,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:56:47,460 INFO L87 Difference]: Start difference. First operand 1044 states and 1361 transitions. Second operand 4 states. [2019-10-14 23:56:48,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:48,443 INFO L93 Difference]: Finished difference Result 3955 states and 5339 transitions. [2019-10-14 23:56:48,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:56:48,447 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 152 [2019-10-14 23:56:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:48,471 INFO L225 Difference]: With dead ends: 3955 [2019-10-14 23:56:48,471 INFO L226 Difference]: Without dead ends: 2917 [2019-10-14 23:56:48,475 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:56:48,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2019-10-14 23:56:48,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2916. [2019-10-14 23:56:48,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2916 states. [2019-10-14 23:56:48,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2916 states to 2916 states and 3758 transitions. [2019-10-14 23:56:48,609 INFO L78 Accepts]: Start accepts. Automaton has 2916 states and 3758 transitions. Word has length 152 [2019-10-14 23:56:48,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:48,609 INFO L462 AbstractCegarLoop]: Abstraction has 2916 states and 3758 transitions. [2019-10-14 23:56:48,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:56:48,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2916 states and 3758 transitions. [2019-10-14 23:56:48,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-14 23:56:48,620 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:48,621 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:56:48,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:56:48,826 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:48,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:48,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1927606987, now seen corresponding path program 1 times [2019-10-14 23:56:48,827 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:48,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649507322] [2019-10-14 23:56:48,829 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:48,829 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:48,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:49,043 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649507322] [2019-10-14 23:56:49,044 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358492326] [2019-10-14 23:56:49,044 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 23:56:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:49,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:56:49,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:49,266 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:49,354 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [166873935] [2019-10-14 23:56:49,377 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 158 [2019-10-14 23:56:49,453 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:56:49,453 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)