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/Problem15_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:08:31,051 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:08:31,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:08:31,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:08:31,067 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:08:31,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:08:31,069 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:08:31,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:08:31,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:08:31,074 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:08:31,075 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:08:31,076 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:08:31,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:08:31,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:08:31,078 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:08:31,079 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:08:31,080 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:08:31,081 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:08:31,083 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:08:31,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:08:31,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:08:31,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:08:31,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:08:31,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:08:31,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:08:31,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:08:31,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:08:31,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:08:31,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:08:31,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:08:31,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:08:31,098 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:08:31,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:08:31,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:08:31,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:08:31,100 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:08:31,101 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 20:08:31,116 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:08:31,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:08:31,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:08:31,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:08:31,117 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:08:31,118 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:08:31,118 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:08:31,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:08:31,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:08:31,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:08:31,119 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:08:31,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:08:31,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:08:31,119 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:08:31,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:08:31,120 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:08:31,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:08:31,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:08:31,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:08:31,121 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:08:31,121 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:08:31,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:08:31,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:08:31,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:08:31,122 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:08:31,122 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:08:31,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:08:31,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:08:31,122 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 20:08:31,390 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:08:31,409 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:08:31,413 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:08:31,414 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:08:31,415 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:08:31,416 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label40.c [2019-10-13 20:08:31,495 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f0d984a9/91bc6a7f3001451fa069ece9eb969ef8/FLAG618962b75 [2019-10-13 20:08:32,154 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:08:32,155 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label40.c [2019-10-13 20:08:32,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f0d984a9/91bc6a7f3001451fa069ece9eb969ef8/FLAG618962b75 [2019-10-13 20:08:32,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f0d984a9/91bc6a7f3001451fa069ece9eb969ef8 [2019-10-13 20:08:32,405 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:08:32,409 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:08:32,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:08:32,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:08:32,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:08:32,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:32" (1/1) ... [2019-10-13 20:08:32,419 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac9f523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:32, skipping insertion in model container [2019-10-13 20:08:32,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:08:32" (1/1) ... [2019-10-13 20:08:32,430 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:08:32,523 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:08:33,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:08:33,522 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:08:33,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:08:33,793 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:08:33,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:33 WrapperNode [2019-10-13 20:08:33,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:08:33,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:08:33,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:08:33,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:08:33,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:33" (1/1) ... [2019-10-13 20:08:33,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:33" (1/1) ... [2019-10-13 20:08:33,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:33" (1/1) ... [2019-10-13 20:08:33,897 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:33" (1/1) ... [2019-10-13 20:08:33,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:33" (1/1) ... [2019-10-13 20:08:33,989 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:33" (1/1) ... [2019-10-13 20:08:34,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:33" (1/1) ... [2019-10-13 20:08:34,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:08:34,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:08:34,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:08:34,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:08:34,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:33" (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 20:08:34,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:08:34,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:08:34,145 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:08:34,145 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:08:34,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:08:34,146 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:08:34,146 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:08:34,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:08:34,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:08:34,147 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:08:34,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:08:34,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:08:34,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:08:38,137 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:08:38,138 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:08:38,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:38 BoogieIcfgContainer [2019-10-13 20:08:38,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:08:38,141 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:08:38,141 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:08:38,145 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:08:38,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:08:32" (1/3) ... [2019-10-13 20:08:38,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3edcb581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:38, skipping insertion in model container [2019-10-13 20:08:38,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:08:33" (2/3) ... [2019-10-13 20:08:38,147 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3edcb581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:08:38, skipping insertion in model container [2019-10-13 20:08:38,147 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:08:38" (3/3) ... [2019-10-13 20:08:38,149 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label40.c [2019-10-13 20:08:38,157 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:08:38,164 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:08:38,174 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:08:38,206 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:08:38,206 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:08:38,206 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:08:38,206 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:08:38,207 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:08:38,207 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:08:38,207 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:08:38,207 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:08:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 20:08:38,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 20:08:38,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:38,245 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] [2019-10-13 20:08:38,247 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:38,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:38,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1190948056, now seen corresponding path program 1 times [2019-10-13 20:08:38,264 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:38,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734210392] [2019-10-13 20:08:38,265 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:38,265 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:38,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:38,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:38,571 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 20:08:38,572 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734210392] [2019-10-13 20:08:38,573 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:38,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:08:38,574 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068098524] [2019-10-13 20:08:38,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:08:38,581 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:38,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:08:38,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:38,600 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 4 states. [2019-10-13 20:08:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:43,841 INFO L93 Difference]: Finished difference Result 1497 states and 2757 transitions. [2019-10-13 20:08:43,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:08:43,843 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-13 20:08:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:43,872 INFO L225 Difference]: With dead ends: 1497 [2019-10-13 20:08:43,872 INFO L226 Difference]: Without dead ends: 993 [2019-10-13 20:08:43,884 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 20:08:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2019-10-13 20:08:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 682. [2019-10-13 20:08:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 20:08:43,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1002 transitions. [2019-10-13 20:08:43,998 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1002 transitions. Word has length 32 [2019-10-13 20:08:43,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:43,999 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1002 transitions. [2019-10-13 20:08:43,999 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:08:43,999 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1002 transitions. [2019-10-13 20:08:44,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-13 20:08:44,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:44,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:08:44,005 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:44,006 INFO L82 PathProgramCache]: Analyzing trace with hash 679417420, now seen corresponding path program 1 times [2019-10-13 20:08:44,006 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:44,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754315190] [2019-10-13 20:08:44,006 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:44,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:44,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:44,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:44,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754315190] [2019-10-13 20:08:44,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148547677] [2019-10-13 20:08:44,380 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 20:08:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:44,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:08:44,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:44,558 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:44,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:44,818 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:08:44,819 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 12 [2019-10-13 20:08:44,819 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980772759] [2019-10-13 20:08:44,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 20:08:44,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:44,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 20:08:44,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:08:44,826 INFO L87 Difference]: Start difference. First operand 682 states and 1002 transitions. Second operand 7 states. [2019-10-13 20:08:51,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:51,683 INFO L93 Difference]: Finished difference Result 2345 states and 3373 transitions. [2019-10-13 20:08:51,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 20:08:51,684 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2019-10-13 20:08:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:51,694 INFO L225 Difference]: With dead ends: 2345 [2019-10-13 20:08:51,694 INFO L226 Difference]: Without dead ends: 1669 [2019-10-13 20:08:51,697 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2019-10-13 20:08:51,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1669 states. [2019-10-13 20:08:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1669 to 1345. [2019-10-13 20:08:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2019-10-13 20:08:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1830 transitions. [2019-10-13 20:08:51,751 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1830 transitions. Word has length 101 [2019-10-13 20:08:51,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:51,752 INFO L462 AbstractCegarLoop]: Abstraction has 1345 states and 1830 transitions. [2019-10-13 20:08:51,752 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 20:08:51,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1830 transitions. [2019-10-13 20:08:51,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 20:08:51,756 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:51,757 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:08:51,960 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:08:51,961 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:51,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:51,962 INFO L82 PathProgramCache]: Analyzing trace with hash -603532513, now seen corresponding path program 1 times [2019-10-13 20:08:51,962 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:51,963 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705015939] [2019-10-13 20:08:51,963 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:51,964 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:51,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:52,223 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:52,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705015939] [2019-10-13 20:08:52,224 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:52,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:08:52,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427332086] [2019-10-13 20:08:52,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:08:52,236 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:52,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:08:52,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:08:52,239 INFO L87 Difference]: Start difference. First operand 1345 states and 1830 transitions. Second operand 6 states. [2019-10-13 20:08:55,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:55,991 INFO L93 Difference]: Finished difference Result 3686 states and 5245 transitions. [2019-10-13 20:08:55,992 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:08:55,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 106 [2019-10-13 20:08:55,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:56,014 INFO L225 Difference]: With dead ends: 3686 [2019-10-13 20:08:56,014 INFO L226 Difference]: Without dead ends: 2347 [2019-10-13 20:08:56,018 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 20:08:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2019-10-13 20:08:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2308. [2019-10-13 20:08:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2308 states. [2019-10-13 20:08:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2308 states to 2308 states and 3185 transitions. [2019-10-13 20:08:56,117 INFO L78 Accepts]: Start accepts. Automaton has 2308 states and 3185 transitions. Word has length 106 [2019-10-13 20:08:56,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:56,119 INFO L462 AbstractCegarLoop]: Abstraction has 2308 states and 3185 transitions. [2019-10-13 20:08:56,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:08:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2308 states and 3185 transitions. [2019-10-13 20:08:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 20:08:56,128 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:56,129 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:08:56,129 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:56,129 INFO L82 PathProgramCache]: Analyzing trace with hash -986664877, now seen corresponding path program 1 times [2019-10-13 20:08:56,130 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:56,130 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807282688] [2019-10-13 20:08:56,130 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:56,130 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:56,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:56,329 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807282688] [2019-10-13 20:08:56,330 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:08:56,330 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:08:56,330 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711274760] [2019-10-13 20:08:56,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:08:56,332 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:56,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:08:56,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:56,333 INFO L87 Difference]: Start difference. First operand 2308 states and 3185 transitions. Second operand 4 states. [2019-10-13 20:08:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:59,767 INFO L93 Difference]: Finished difference Result 6800 states and 9448 transitions. [2019-10-13 20:08:59,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:08:59,768 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2019-10-13 20:08:59,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:59,793 INFO L225 Difference]: With dead ends: 6800 [2019-10-13 20:08:59,793 INFO L226 Difference]: Without dead ends: 4498 [2019-10-13 20:08:59,801 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 20:08:59,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4498 states. [2019-10-13 20:08:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4498 to 4493. [2019-10-13 20:08:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4493 states. [2019-10-13 20:08:59,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4493 states to 4493 states and 5779 transitions. [2019-10-13 20:08:59,989 INFO L78 Accepts]: Start accepts. Automaton has 4493 states and 5779 transitions. Word has length 112 [2019-10-13 20:08:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:59,991 INFO L462 AbstractCegarLoop]: Abstraction has 4493 states and 5779 transitions. [2019-10-13 20:08:59,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:08:59,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4493 states and 5779 transitions. [2019-10-13 20:08:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-10-13 20:08:59,994 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:59,995 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:08:59,995 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:59,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:59,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1976934134, now seen corresponding path program 1 times [2019-10-13 20:08:59,996 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:59,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849974993] [2019-10-13 20:08:59,998 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:59,999 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:59,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:00,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:00,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849974993] [2019-10-13 20:09:00,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039712729] [2019-10-13 20:09:00,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:09:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:00,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 20:09:00,379 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:09:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:00,456 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:09:00,590 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:09:00,591 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:09:00,591 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 15 [2019-10-13 20:09:00,591 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226358748] [2019-10-13 20:09:00,592 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:09:00,593 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:00,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:09:00,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2019-10-13 20:09:00,594 INFO L87 Difference]: Start difference. First operand 4493 states and 5779 transitions. Second operand 6 states. [2019-10-13 20:09:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:09:06,141 INFO L93 Difference]: Finished difference Result 12799 states and 17374 transitions. [2019-10-13 20:09:06,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 20:09:06,142 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2019-10-13 20:09:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:09:06,182 INFO L225 Difference]: With dead ends: 12799 [2019-10-13 20:09:06,182 INFO L226 Difference]: Without dead ends: 8312 [2019-10-13 20:09:06,195 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2019-10-13 20:09:06,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8312 states. [2019-10-13 20:09:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8312 to 8292. [2019-10-13 20:09:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8292 states. [2019-10-13 20:09:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8292 states to 8292 states and 11145 transitions. [2019-10-13 20:09:06,401 INFO L78 Accepts]: Start accepts. Automaton has 8292 states and 11145 transitions. Word has length 127 [2019-10-13 20:09:06,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:09:06,404 INFO L462 AbstractCegarLoop]: Abstraction has 8292 states and 11145 transitions. [2019-10-13 20:09:06,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:09:06,404 INFO L276 IsEmpty]: Start isEmpty. Operand 8292 states and 11145 transitions. [2019-10-13 20:09:06,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-13 20:09:06,409 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:09:06,409 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, 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:09:06,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:09:06,616 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:09:06,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:09:06,617 INFO L82 PathProgramCache]: Analyzing trace with hash 316777602, now seen corresponding path program 1 times [2019-10-13 20:09:06,617 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:09:06,617 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678980066] [2019-10-13 20:09:06,617 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:06,617 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:09:06,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:09:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:09:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 20:09:06,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678980066] [2019-10-13 20:09:06,784 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:09:06,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:09:06,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311725733] [2019-10-13 20:09:06,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:09:06,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:09:06,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:09:06,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:09:06,785 INFO L87 Difference]: Start difference. First operand 8292 states and 11145 transitions. Second operand 4 states.