java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:06:25,152 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:06:25,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:06:25,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:06:25,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:06:25,177 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:06:25,179 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:06:25,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:06:25,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:06:25,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:06:25,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:06:25,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:06:25,201 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:06:25,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:06:25,205 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:06:25,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:06:25,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:06:25,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:06:25,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:06:25,216 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:06:25,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:06:25,220 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:06:25,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:06:25,222 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:06:25,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:06:25,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:06:25,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:06:25,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:06:25,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:06:25,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:06:25,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:06:25,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:06:25,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:06:25,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:06:25,230 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:06:25,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:06:25,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:06:25,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:06:25,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:06:25,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:06:25,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:06:25,233 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 20:06:25,247 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:06:25,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:06:25,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:06:25,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:06:25,249 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:06:25,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:06:25,249 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:06:25,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:06:25,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:06:25,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:06:25,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:06:25,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:06:25,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:06:25,251 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:06:25,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:06:25,251 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:06:25,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:06:25,251 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:06:25,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:06:25,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:06:25,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:06:25,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:06:25,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:06:25,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:06:25,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:06:25,253 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:06:25,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:06:25,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:06:25,253 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 20:06:25,547 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:06:25,560 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:06:25,563 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:06:25,565 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:06:25,565 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:06:25,566 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label05.c [2019-10-13 20:06:25,649 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff862c0ce/d28e89e349a44b679ea7d5a9f6a805ab/FLAG40dff3d59 [2019-10-13 20:06:26,257 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:06:26,258 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label05.c [2019-10-13 20:06:26,270 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff862c0ce/d28e89e349a44b679ea7d5a9f6a805ab/FLAG40dff3d59 [2019-10-13 20:06:26,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff862c0ce/d28e89e349a44b679ea7d5a9f6a805ab [2019-10-13 20:06:26,526 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:06:26,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:06:26,531 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:06:26,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:06:26,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:06:26,536 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:26" (1/1) ... [2019-10-13 20:06:26,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5370fc2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:26, skipping insertion in model container [2019-10-13 20:06:26,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:06:26" (1/1) ... [2019-10-13 20:06:26,549 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:06:26,616 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:06:27,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:06:27,198 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:06:27,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:06:27,388 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:06:27,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:27 WrapperNode [2019-10-13 20:06:27,389 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:06:27,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:06:27,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:06:27,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:06:27,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:27" (1/1) ... [2019-10-13 20:06:27,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:27" (1/1) ... [2019-10-13 20:06:27,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:27" (1/1) ... [2019-10-13 20:06:27,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:27" (1/1) ... [2019-10-13 20:06:27,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:27" (1/1) ... [2019-10-13 20:06:27,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:27" (1/1) ... [2019-10-13 20:06:27,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:27" (1/1) ... [2019-10-13 20:06:27,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:06:27,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:06:27,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:06:27,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:06:27,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:27" (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 20:06:27,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:06:27,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:06:27,601 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:06:27,601 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:06:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:06:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:06:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:06:27,601 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:06:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:06:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:06:27,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:06:29,016 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:06:29,016 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:06:29,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:29 BoogieIcfgContainer [2019-10-13 20:06:29,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:06:29,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:06:29,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:06:29,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:06:29,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:06:26" (1/3) ... [2019-10-13 20:06:29,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7105308f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:29, skipping insertion in model container [2019-10-13 20:06:29,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:06:27" (2/3) ... [2019-10-13 20:06:29,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7105308f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:06:29, skipping insertion in model container [2019-10-13 20:06:29,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:06:29" (3/3) ... [2019-10-13 20:06:29,039 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label05.c [2019-10-13 20:06:29,049 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:06:29,059 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:06:29,070 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:06:29,106 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:06:29,106 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:06:29,107 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:06:29,107 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:06:29,107 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:06:29,108 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:06:29,108 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:06:29,108 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:06:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:06:29,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-13 20:06:29,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:29,158 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] [2019-10-13 20:06:29,161 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:29,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:29,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1411665610, now seen corresponding path program 1 times [2019-10-13 20:06:29,176 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:29,176 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192916336] [2019-10-13 20:06:29,176 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:29,177 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:29,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:29,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:29,591 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 20:06:29,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192916336] [2019-10-13 20:06:29,593 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:29,593 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:06:29,594 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174126734] [2019-10-13 20:06:29,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:06:29,600 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:29,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:06:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:06:29,624 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-13 20:06:30,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:30,797 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-13 20:06:30,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:06:30,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2019-10-13 20:06:30,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:30,818 INFO L225 Difference]: With dead ends: 688 [2019-10-13 20:06:30,819 INFO L226 Difference]: Without dead ends: 372 [2019-10-13 20:06:30,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:06:30,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-13 20:06:30,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-13 20:06:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:06:30,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-13 20:06:30,943 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 69 [2019-10-13 20:06:30,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:30,944 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-13 20:06:30,944 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:06:30,944 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-13 20:06:30,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 20:06:30,952 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:30,952 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:06:30,953 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:30,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:30,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1477947551, now seen corresponding path program 1 times [2019-10-13 20:06:30,953 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:30,954 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944224365] [2019-10-13 20:06:30,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:30,954 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:30,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:31,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944224365] [2019-10-13 20:06:31,225 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:31,225 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:06:31,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473203883] [2019-10-13 20:06:31,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:06:31,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:31,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:06:31,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:06:31,228 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-13 20:06:32,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:32,606 INFO L93 Difference]: Finished difference Result 1122 states and 1837 transitions. [2019-10-13 20:06:32,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:06:32,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 138 [2019-10-13 20:06:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:32,614 INFO L225 Difference]: With dead ends: 1122 [2019-10-13 20:06:32,614 INFO L226 Difference]: Without dead ends: 756 [2019-10-13 20:06:32,616 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:06:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2019-10-13 20:06:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 752. [2019-10-13 20:06:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2019-10-13 20:06:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1190 transitions. [2019-10-13 20:06:32,667 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1190 transitions. Word has length 138 [2019-10-13 20:06:32,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:32,667 INFO L462 AbstractCegarLoop]: Abstraction has 752 states and 1190 transitions. [2019-10-13 20:06:32,668 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:06:32,668 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1190 transitions. [2019-10-13 20:06:32,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-13 20:06:32,671 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:32,671 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:32,671 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:32,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:32,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1280489606, now seen corresponding path program 1 times [2019-10-13 20:06:32,672 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:32,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671962601] [2019-10-13 20:06:32,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:32,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:32,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:32,783 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:32,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671962601] [2019-10-13 20:06:32,784 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:32,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:06:32,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561398155] [2019-10-13 20:06:32,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:32,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:32,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:32,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:06:32,786 INFO L87 Difference]: Start difference. First operand 752 states and 1190 transitions. Second operand 5 states. [2019-10-13 20:06:34,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:34,010 INFO L93 Difference]: Finished difference Result 1904 states and 3099 transitions. [2019-10-13 20:06:34,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:06:34,013 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 139 [2019-10-13 20:06:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:34,026 INFO L225 Difference]: With dead ends: 1904 [2019-10-13 20:06:34,027 INFO L226 Difference]: Without dead ends: 1158 [2019-10-13 20:06:34,031 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:06:34,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2019-10-13 20:06:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1138. [2019-10-13 20:06:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1138 states. [2019-10-13 20:06:34,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1632 transitions. [2019-10-13 20:06:34,119 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1632 transitions. Word has length 139 [2019-10-13 20:06:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:34,121 INFO L462 AbstractCegarLoop]: Abstraction has 1138 states and 1632 transitions. [2019-10-13 20:06:34,121 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:34,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1632 transitions. [2019-10-13 20:06:34,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 20:06:34,126 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:34,127 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:06:34,127 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:34,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:34,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1200752790, now seen corresponding path program 1 times [2019-10-13 20:06:34,128 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:34,128 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462863928] [2019-10-13 20:06:34,128 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:34,128 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:34,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:34,332 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:34,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462863928] [2019-10-13 20:06:34,332 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:34,333 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:06:34,333 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508760212] [2019-10-13 20:06:34,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:34,334 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:34,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:34,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:06:34,335 INFO L87 Difference]: Start difference. First operand 1138 states and 1632 transitions. Second operand 5 states. [2019-10-13 20:06:35,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:35,532 INFO L93 Difference]: Finished difference Result 2880 states and 4162 transitions. [2019-10-13 20:06:35,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:06:35,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-10-13 20:06:35,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:35,545 INFO L225 Difference]: With dead ends: 2880 [2019-10-13 20:06:35,545 INFO L226 Difference]: Without dead ends: 1748 [2019-10-13 20:06:35,550 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:06:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1748 states. [2019-10-13 20:06:35,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1748 to 1326. [2019-10-13 20:06:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1326 states. [2019-10-13 20:06:35,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1326 states to 1326 states and 1863 transitions. [2019-10-13 20:06:35,607 INFO L78 Accepts]: Start accepts. Automaton has 1326 states and 1863 transitions. Word has length 141 [2019-10-13 20:06:35,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:35,608 INFO L462 AbstractCegarLoop]: Abstraction has 1326 states and 1863 transitions. [2019-10-13 20:06:35,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:35,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1326 states and 1863 transitions. [2019-10-13 20:06:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-10-13 20:06:35,612 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:35,612 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:35,613 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1200458230, now seen corresponding path program 1 times [2019-10-13 20:06:35,613 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:35,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596410221] [2019-10-13 20:06:35,614 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:35,614 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:35,614 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 20:06:35,818 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596410221] [2019-10-13 20:06:35,818 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:35,818 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:06:35,818 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025149006] [2019-10-13 20:06:35,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:06:35,819 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:35,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:06:35,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:35,820 INFO L87 Difference]: Start difference. First operand 1326 states and 1863 transitions. Second operand 4 states. [2019-10-13 20:06:37,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:37,226 INFO L93 Difference]: Finished difference Result 4126 states and 5834 transitions. [2019-10-13 20:06:37,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:06:37,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2019-10-13 20:06:37,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:37,242 INFO L225 Difference]: With dead ends: 4126 [2019-10-13 20:06:37,242 INFO L226 Difference]: Without dead ends: 2806 [2019-10-13 20:06:37,247 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 20:06:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2019-10-13 20:06:37,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2258. [2019-10-13 20:06:37,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2258 states. [2019-10-13 20:06:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2258 states to 2258 states and 3058 transitions. [2019-10-13 20:06:37,316 INFO L78 Accepts]: Start accepts. Automaton has 2258 states and 3058 transitions. Word has length 225 [2019-10-13 20:06:37,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:37,317 INFO L462 AbstractCegarLoop]: Abstraction has 2258 states and 3058 transitions. [2019-10-13 20:06:37,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:06:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand 2258 states and 3058 transitions. [2019-10-13 20:06:37,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2019-10-13 20:06:37,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:37,327 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:06:37,327 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:37,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:37,328 INFO L82 PathProgramCache]: Analyzing trace with hash 451455961, now seen corresponding path program 1 times [2019-10-13 20:06:37,328 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:37,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260183147] [2019-10-13 20:06:37,329 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:37,329 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:37,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 230 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:37,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260183147] [2019-10-13 20:06:37,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881613165] [2019-10-13 20:06:37,705 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 20:06:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:37,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:06:37,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:37,926 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 20:06:38,119 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:38,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:38,284 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:38,288 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:38,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:38,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:38,384 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:06:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 124 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:38,713 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:06:38,714 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 5] total 13 [2019-10-13 20:06:38,716 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590258371] [2019-10-13 20:06:38,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:38,718 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:38,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:38,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-13 20:06:38,719 INFO L87 Difference]: Start difference. First operand 2258 states and 3058 transitions. Second operand 5 states. [2019-10-13 20:06:40,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:40,187 INFO L93 Difference]: Finished difference Result 4360 states and 5977 transitions. [2019-10-13 20:06:40,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:06:40,187 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2019-10-13 20:06:40,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:40,205 INFO L225 Difference]: With dead ends: 4360 [2019-10-13 20:06:40,205 INFO L226 Difference]: Without dead ends: 2290 [2019-10-13 20:06:40,213 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 679 GetRequests, 664 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2019-10-13 20:06:40,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2019-10-13 20:06:40,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 2270. [2019-10-13 20:06:40,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2270 states. [2019-10-13 20:06:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2270 states to 2270 states and 3040 transitions. [2019-10-13 20:06:40,297 INFO L78 Accepts]: Start accepts. Automaton has 2270 states and 3040 transitions. Word has length 334 [2019-10-13 20:06:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:40,298 INFO L462 AbstractCegarLoop]: Abstraction has 2270 states and 3040 transitions. [2019-10-13 20:06:40,298 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2270 states and 3040 transitions. [2019-10-13 20:06:40,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2019-10-13 20:06:40,403 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:40,404 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:06:40,610 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:06:40,611 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:40,611 INFO L82 PathProgramCache]: Analyzing trace with hash -614545183, now seen corresponding path program 1 times [2019-10-13 20:06:40,612 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:40,612 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609154481] [2019-10-13 20:06:40,612 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:40,612 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:40,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 272 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:41,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609154481] [2019-10-13 20:06:41,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950748790] [2019-10-13 20:06:41,584 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 20:06:41,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:41,705 INFO L256 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:06:41,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:41,780 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:06:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 350 proven. 53 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 20:06:42,071 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:42,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:06:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 194 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:42,648 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [417890177] [2019-10-13 20:06:42,654 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 419 [2019-10-13 20:06:42,735 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:06:42,735 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)